Motor transfer 500 J of electrical into gravitational potential energy in 40 s. calculate the power of the motor.
1. Motor transfer 500 J of electrical into gravitational potential energy in 40 s. calculate the power of the motor.
Answer:
U is the change in PE, m is the mass raised through a distance h. So, given m = 61.2 kg, each 1 m rise is an increase of (61.2)(9.8) = 600 J.
Explanation:
2. Calculate the electric potential at 0.001 m from a charge of 2pC. if there is a 124 N electrostatic force between two charges. If the charges are 4 μC and 9 μC, how far apart are they from one another? Calculate the change in electric potential energy when 5C of charge is moved through a +5V potential difference.
The electric potential at a point near a charged particle can be calculated using Coulomb's law and the equation for electric potential, which is given by:
V = k * q / r
where:k = Coulomb's constant, 8.99 x 10^9 Nm^2/C^2
q = the charge of the particle, in this case 2 pC = 2 x 10^-12 C
r = the distance from the charge, in this case 0.001 m
So, substituting the values, we get:
V = 8.99 x 10^9 Nm^2/C^2 * 2 x 10^-12 C / 0.001 m = 17.98 x 10^3 V
Regarding the second question, the force between two charges can be calculated using Coulomb's law:
F = k * q1 * q2 / r^2
where:q1 and q2 are the charges of the two particles, in this case 4 μC and 9 μC, respectively
r is the distance between the charges
So, rearranging the equation and substituting the known values, we get:
r^2 = k * q1 * q2 / F
r = sqrt(k * q1 * q2 / F) = sqrt(8.99 x 10^9 Nm^2/C^2 * 4 x 10^-6 C * 9 x 10^-6 C / 124 N) = 1.34 x 10^-6 m
So, the two charges are 1.34 x 10^-6 meters apart from one another.
Regarding the third question, the change in electric potential energy can be calculated using the equation:
ΔU = q * ΔV
where:q = the amount of charge being moved, in this case 5 C
ΔV = the potential difference, in this case +5 V
So, substituting the values, we get:
ΔU = 5 C * 5 V = 25 J
The change in electric potential energy is 25 J.
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Correct me if I'm wrong. Thank you! (^^)
3. Electric Potential Energy Problem: A +35 u point charge moves from point A to point B. The magnitude of the electric field is 3x106N/C. points a and b are 60 cm. and 10 cm. above the negatively charge plate. 1. Draw a body diagram: (5 pts) II. Calculate the following: show your solutions, no solution, no points credit. (15 pts) a. What is the Electric potential energy at points A and B?b. How much work is done to move the charge from point A to B? c. What is the electric potential of points A and B?
Answer:
pu ta i na nyo hindi ako marunog sa aakin sainyo
4. Problem: A proton is released from rest at x = -2.00 cm in a constant electric field with a magnitude 1.50 x 103 N/C, pointing in the positive x-direction. (a) Calculate the change in the electric potential energy associated with the proton when it reaches x = 5.00 cm. (b) An electron is now fired in the same direction from the same position. What is the change in electric potential energy associated with the electron if it reaches x = 12.0 cm? (c) If the direction of the electric field is reversed and an electron is released from rest at x = 3.00 cm, by how much has the electric potential energy changed when the electron reaches x = 7.00 cm?
Answer:
b. po yan
Explanation:
hope its helps pa brainliest po
5. 5) What will happen to the value of work if the distance is increased? A remains the same Cdecrease B increase D will increase and decrease 6) The ability to do work is called: A. Power C. Work B. Energy D. Force 7) Energy is measured in: A Horsepower C Newtons D. Kilogram B. Joules 8) Stored energy is correctly termed as: C. Kinetic energy A Radiant energy D. Thermal energy B. Potential energy 9) Moving energy is correctly termed as: A. Potential energy B. Sound energy C. Electric energy D. Kinetic energy C. Energy 10) An example of potential energy is the energy of A. A stereo playing music C. Food B. A moving arrow D. Fast car 11) Power in physics is the rate at which is used. A. Current B. Speed D. Force 12) To calculate power, we use the formula: Power - work divided by A. Time C. Energy B. Force D. Mass 13) What is the standard unit of measurement for power? A Joule C. Meter per second B. Kilogram D. Watt 14) If it takes 10 J of work to move a rock 15 meters in 5 seconds, what is the power? A. I watt C. 3 watts B 2 watts D. 4 watts 15) If it takes 50 J of work to climb a set of stairs, how fast would you have to climb them to Watts of power? A 2 s C9s D. 105 B. 53
Answer:
5.B.Increase
6.B.Energy
7.B.Joules
8.B.Potential Energy
9.D.Kinetic Energy
Explanation:
HOPE IT'S HELP;)
6. 11. It is an energy possess by a moving objects. a. Potential energy b. kinetic energy c. friction 12. A 10 kg cat resting on a tree has a potential energy of 50 J. Calculate its position (height) relative to the ground. a. The cat is located 5.10 m above the ground. b. The cat is located 500 m above the ground. c. The cat is located 5 m above the ground. d. The cat is located 0.20 m above the ground. 13. The greater the mass of an object, a. The easier the object starts moving c. The more space it takes up b. The greater its inertia d. the more balanced it is 14. A man jumps away from the boat so does the boat move away from him, what law of motion was observed? a. Law of Interaction c. Law of Inertia b. Law of Acceleration d. Law of Conservation of Energy 15. Suppose a cart is being moved by a force. Suppose a load is dumped into the cart so that the cart's mass becomes double. What happens to the cart's acceleration? a. It doubles b. It halves c. It quadruples d. It quarters 16. Which medium will sound travels the fastest? a. Solid b. liquid C. gas d. metals 17. An object that does not vibrate cannot produce_ A. Sound b. light c. Heat d. electricity 18. Which of the following is TRUE about the effect of temperature to the rate of how sound travels? A. Temperature increases the speed of sound B. Temperature decreases the speed of sound C. Warmer particles move at slower rate D. Warmer particles move at constant rate. 19. Which of the following factors greatly affects the pitch of a sound? A. The amplitude of sound wave c. the frequency of a sound wave B. The distance of a sound wave d. the loudness of a sound wave 20. What happens to the sound an object makes when the speed of vibrations decreases (slow down)? A. Its volume increase. C. Its pitch becomes lower. B. Its pitch rises d. Its volume decreases.
Answer:
11.B.
12.C.
13.C.
14.A.
15.D.
16.B.
17.D.
18.C.
19.A.
20.B.
7. For the following problems, there is no need to consider the position vector. Simplyfind the magnitude of what is being asked.a. Determine the electric field emitted by a negative point charge with magnitude of 5.6 nC at 7.4 cm away.b. If a 32.3mu*C charge applies a force of 5.3 * 10 ^ - 2 * N onto a 29.5mu*C what is theelectric field of the 29.5 µC?15. Two charges with magnitude of 41.3mu*C are placed 20.2 cm apart from each other.Calculate the electric potential energy between the two charges.16. A positively charged 9.8 nC point charge is separated from a positively charged 10.6mu*C point charge by 0.71 cm. Calculate the electric potential energy between the two charges.17. Determine the work needed to move a 13.3 mC charge from 1.2 mm to 0.41 cm.18. Following from problem 17, illustrate the equipotential surface of the straightconductor.19. In the figure below, which has the greatest potential difference, the potential difference from points a to c, from points b to e, or from points a to e? Explain why.20. From the image in problem 19, what is the potential difference between points fand b? Explain your answer.21. Given a capacitance of 30 nF and a voltage of 30 J, compute for the charge andenergy.22. Given a set of capacitors: 12 nF, 6n*F_{1} 9nF 4mu*F 2 pF and 7mu*F solve the followingproblems:a. Solve the total capacitance for a series circuit and illustrate the circuit. b. If the series circuit is connected to a 30 V battery, find the total charge.c. Given the same voltage, solve for the energy.23. Given a set of capacitors: 7 nF, 6nF 5nF 1mu*F, 3pF and 10mu*F solve the following problems:a. Solve the total capacitance for a parallel circuit and illustrate the circuit. b. If the parallel circuit is connected to a 60 V battery, find the total charge.c. Given the same voltage, solve for the energy.
ANSWER
a. The electric field emitted by a negative point charge with magnitude of 5.6 nC at 7.4 cm away is 1.03 x 10^5 N/C.
b. The electric field of the 29.5 µC is 1.63 x 10^5 N/C.
15. The electric potential energy between the two charges is 2.81 x 10^-17 J.
16. The electric potential energy between the two charges is 1.12 x 10^-18 J.
17. The work needed to move a 13.3 mC charge from 1.2 mm to 0.41 cm is 5.61 x 10^-14 J.
18. The equipotential surface of the straight conductor is a plane perpendicular to the direction of the electric field.
19. The potential difference from points b to e has the greatest potential difference because it involves crossing the greatest number of equipotential surfaces.
20. The potential difference between points f and b is zero because they are on the same equipotential surface.
21. The charge is 1 C and the energy is 900 J.
22.
a. The total capacitance for a series circuit is 3.97 nF.
b. The total charge is 1.19 x 10^-4 C.
c. The energy is 5.67 x 10^-3 J.
23.
a. The total capacitance for a parallel circuit is 20.6 nF.
b. The total charge is 1.24 x 10^-6 C.
c. The energy is 4.94 x 10^-4 J.
8. Summative Test No. 3 Transformation of Energy Direction: Read the following question and choose the best answer. 1. according to the Law of Conservation of energy, Energy cannot be A. created, saved C. lost, found B. created, destroyed D. destroyed, destroyed 2. What is energy changing form one form to another? A. energy creation C. mechanical energy B. energy conservation 3. which form of energy is not used when you run an electric fan? A. light D. energy transformation D. mechanical B. electrical C. sound 4. A man rubs two sticks together to create a fire. Which form of energy below is not involved in this process? A. sound B. mechanical C. thermal 5. The sun's energy begins as what form of energy? A. electromagnetic B. chemical C. nuclear D. mechanical 6. What is the energy transformation that occurs in an electric pencil sharpener? A. mechanical energy to electrical energy B. electrical energy to mechanical energy C. radiant/light energy to sound energy D. chemical energy to mechanical energy or destroyed D. chemical functioning correctly? A. chemical to light 7. When a car burns gasoline it creates hot air to move the piston in the engine, which causes the car t move. What energy transformation occur from the fuel to the movement of a car? A. thermal energy to mechanical energy B. thermal energy to chemical energy to mechanical energy C. chemical energy to thermal energy to mechanical energy D. chemical energy to electrical energy 8. Which of the following energy transformations occur when a lamp that is plugged into a wall sock C. electrical to light B. electrical to chemical 9. Which item would have this energy transformation: electrical-thermal-light energy A. toaster D. chemical to electrical B. candle C. windmill D. ironing clothes 10. Which item would have this energy transformation: chemical-thermal-light energy A. electric fan B. candle C. windmill 11. Which item would have this energy transformation: mechanical - sound C. windmill A. flashlight B. nuclear power plant 12. Which item would have this energy transformation: mechanical - electrical A. A. flashlight B. nuclear power plant C. windmill 13. Food produces what kind of energy? A. thermal B chemical D. solar calculator D. playing guitar D. playing guitar C. sound D. kinetic 14. In energy transformation, wasted energy usually takes what form? A. heat B. chemical C. light D. sound 15. Which of the following energy transformation occurs when food is digested? A. chemical-mechanical B. radiant-nuclear C. mechanical - potential D. thermal - mechanical
Answer:
1. B
2. D
3. A
4. A
5. A
6. B
7. C
8. A
9. A
10. B
11. C
12. C
13. B
14. A
15. A
9. Identify the formula of the following. 1. Kinetic Energy 2. Potential Energy 3. Total Mechanical Energy 4. Work 5. Thermal Efficiency Part 2 Enumeration (20 pts) 1-2 General Types of Energy 3-5 Examples of Kinetic Energy 6-8 Examples of Potential Energy 9-14 Sources of Renewable Energy 15-18 Renewal Sources of Energy that has a generator attached to it to produce Electricity. 19-20 Renewal Sources of Energy with no generator just a converter and a heat engine. Part 3 Problem Solving (10pts) Use GASA 1. A motor engines absorbed 5000J of heat energy from a hot reservoir and release 3000J into the surroundings. a. How much work is performed by the motor engines? b. Calculate the thermal Efficiency of the engine.
Answer:Kinetic Energy
Kinetic energy is directly proportional to the mass of the object and to the square of its velocity: K.E. = 1/2 m v2. If the mass has units of kilograms and the velocity of meters per second, the kinetic energy has units of kilograms-meters squared per second squared.
Potential energyGravitational energy or gravitational potential energy is the potential energy a massive object has in relation to another massive object due to gravity. It is the potential energy associated with the gravitational field, which is released when the objects fall towards each other.
Total Mechanical EnergyThe total mechanical energy is the sum of kinetic and potential energies: E = K + U.
WorkWhen the force is constant and along the same line as the motion, the work can be calculated by multiplying the force by the distance, W = Fd (letting both F and d have positive or negative signs, according to the coordinate system chosen).
Thermal EfficiencyThe thermal efficiency, ηth, represents the fraction of heat, QH, that is converted to work. The air-standard Otto cycle thermal efficiency is a function of compression ratio and κ = cp/cv. The thermal efficiency, ηth, represents the fraction of heat, QH, that is converted to work.
10. 11. It is a form of energy possessed by something that moves. ①Chemical energy ②Electrical energy ③Mechanical energy 12. What energy is used by our body that enable us to walk or run? ④Sound energy ①Chemical energy ②Electrical energy ③Mechanical energy ④Sound energy 13. The form of energy that is described as stored is called _____ ①Chemical energy ②Electrical energy 14. The energy at rest is also known as… ③Mechanical energy ④Sound energy ①Chemical energy ③Potential energy ②Electrical energy 15. The energy in motion is called as… ④Kinetic energy ①Chemical energy ②Electrical energy ③Potential energy ④Kinetic energy 16. Which statement below describes what mechanical energy is? ①Mechanical energy refers to the release of chemical energy from food or fuel. ②Mechanical energy is stored energy. ③Mechanical energy is used by moving objects. ④Only machines can produces mechanical energy? 17. Which of the following objects use mechanical energy? ①Running water ②Wind ③Moving Engine ④Hill 18. Which of the following objects use mechanical energy? ①A statue ③A sticking clock ②A mountain ④A wall decor 19.Which of the body system is responsible for using mechanical energy? ①The digestive system ②The skeletal system ③The muscular system ④None of the above 20. The following are example of mechanical energy, except one. Which is it? ①Moving car ②Running boy ③Dancing lady ④The energy stored in a battery 21.Some of the sunlight energy is used by plants in the process of photosynthesis. The energy stored during this process is called ________ energy. ①Chemical energy ②Heat energy ③Electrical energy ④Mechanical energy 22. Which statement below describes chemical energy? ①Chemical energy is a stored energy. ②Chemical energy causes objects to move. ③Chemical energy is the energy released by a chemical change. ④All of the above. 23-24.Which of these describe the use of chemical energy? Choose 2 only. ①Calculator and solar panels uses chemical energy. ②Modern appliances used chemical energy in order to function. ③Human and animals eat plants as foods which contain chemical energy. ④The energy stored in batteries has chemical energy which is converted into electric when used. 25.The following examples described the uses of chemical energy except one, which is it? ①Stored energy used by plants in the process of photosynthesis. ②Energy used to make the electric fans, washing machines and toys to move.
Answer:
11.1
12.2
13.2
14.4
15.3
16.1
17.1
18.4
19.2
20.2
Explanation:
sorry po yon lang po kasi may time po kasi ehh
11. Problem Solving: Analyze and solve the given problems carefully. Write your answer in the space provided. Don't forget to put the unit of your final answer and round off your answer to the nearest hundredths. Example: 245671 J 456.50 J 67878.90 J 345.40 W NONSENSE ANSWER= REPORT PLEASE KINDLY ANSWER IT CORRECTLY 1. Calculate the power output in watts of a 50 kg student who climbs a flight of stairs 5.7 m high in 7.3 s. 2.How much work is done if a force of 45.67 N moves an object to a distance of 9.3 m? 3.A 1320 kg car travels at 13.5 m/s. What is it kinetic energy? 4.A small electric motor is used to lift a 256 N water tank to a 5.7 m above the ground in 7.2 s. Calculate the power output of the motor. 5.A 15 kg rock rested on the top of the mountain at the height of 400.25 m. What is it potential energy?
Answer:
1. The power of an object doing a work W in a given
time t is given by
where:
P = power
W = work
t = time
Solving for F
F = weight = mg
F = (50 kg)(9.8 m/s²)
F = 490 N
Solving for W
W = Fd
W = (490 N)(5.7 m)
W = 2,793 J
Solving for P
Therefore, the amount of power output is 382.6 W.
Yan lang po alam ko, hope it helps:)
12. KNOWING WHAT YOU ALREADY KNOW (PRE-ASSESSMENT)Direction: Choose the letter of the best answer and write this on your answer sheet.1) In which of the following situations is work being done from a scientist’s perspective?A. a person sitting on the chair c. a person walking with a load on its headB. a person pushing the wall D. a person lifting a box2) Which of these equations gives the amount of work done?A. Work = F/d C. Work = FdB. Work = Fgd D. Work = F/t3) How much work is done in holding a 1-kg object 2 m above the ground?A. zero C. 9.8B. 2 D. 19.64) How much work was done on an object when a constant force of 20 N pushed it 2 m away?A. zero C. 20B. 10 D. 405) What will happen to the value of work if the distance is increased?A. remains the sameB. increaseC. decreaseD. will increase and decrease6) The ability to do work is called: A. PowerB. EnergyC. WorkD. Force 7) Energy is measured in:A. HorsepowerB. JoulesC. NewtonsD. Kilogram 8) Stored energy is correctly termed as:A. Radiant energyB. Potential energyC. Kinetic energyD. Thermal energy9) Moving energy is correctly termed as:A. Potential energyB. Sound energyC. Electric energyD. Kinetic energy10) An example of potential energy is the energy of:A. A stereo playing musicB. A moving arrowC. FoodD. Fast car11) Power in physics is the rate at which __________ is used.A. CurrentB. SpeedC. EnergyD. Force12) To calculate power, we use the formula: Power = work divided by __________.A. TimeB. ForceC. EnergyD. Mass 13) What is the standard unit of measurement for power?A. JouleB. KilogramC. Meter per secondD. Watt14) If it takes 10 J of work to move a rock 15 meters in 5 seconds, what is the power?A. 1 wattB. 2 wattsC. 3 wattsD. 4 watts15) If it takes 50 J of work to climb a set of stairs, how fast would you have to climb them to use 5 Watts of power?A. 2 sB. 5 sC. 9 sD. 10 s
ABBADCABCDDACACDCADB
13. 18. If a green ball is higher from the ground than a yellow ball and both have thesame mass, which ball has more potential energy?A. green ball B. yellow ball C. both has the same PE D. both has the same KE19. Which of the following factors does the speed of sound dependeA. density B. elasticity C. temperature D. all of the above20. An echo occurs when a sound wave isA. absorbed B. reflected C. refracted D. transmitted21. What happens to the speed of sound as the temperature increasesA. constant B. decreases C. increases D. cannot be determined_22. Which phenomenon explains why sound is heard at longer distances at nightthan in dayaA. echolocation B. reflection C.refraction D.reverberation23. How fast does sound travel if the air temperature is 200C?A. 334 m/s B. 340 m/s C. 343 m/s 0.345 m/s24. What is the electric current if a circuit has a resistance of 100 2 and voltage of 12.0 V2A. 0.120 A B. 9.00 A C. 12.0 A D.25.0 A25. What is the electric current if a circuit has a resistance of 100 Q and a voltage of 6.00 V?A. 0.0600 A B. 4.50 A C. 6.00 A D. 12.5 A_26. What is the voltage of a circuit that has a resistance of 6 KQ and a current of 2 mA?A.IVB. 10 VC. 11 V D. 12 V27. What will happen to the current if the voltage is reduced to one half?A. tripled B. doubled C. decreased by one hali D. decreased by one fourth_28. Calculate the voltage if the current passing through the wire is 3 A. and has aresistance of 10 22.A.6VB. 30 V C.75 V D. 150 V27. Condition occurs when current takes the path of less resistance or zero resistance thatwould result to infinite amount of current, causing sudden explosion in the circuit.A.28. Refers to circuit condition where current traveling from the positive conducting wire,bypass the negative conducting wire and flows through by through the metal casing of anappliance.A. UPSB. EARTHING C. GROUNDING D.AC DC29. It is a current that travels from negative to the positive terminal. It does not changeits direction. It is the current we can get from a battery.D.C. passing your body can not causeelectric shock but can cause burning if the positive and negative wire can come into contact.A. UPSB. EARTHING C. GROUNDING D.AC DC30. li is a device designed to protect our home appliances by regulating voltageautomatically. It takes a fluctuating voltage level return into a constant voltage levelA. UPSB. EARTHING C. GROUNDING D.AC DC
Answer:
1 A 2 A 3 A 4 A 5 A 6 A 7 A 8 A 9A 10 A
14. 1. which of the following statements is true about projectile motion? a. as the velocity in the vertical component increases, its corresponding horizontal component also increases. b. as the velocity in the vertical component decreases, its corresponding horizontal component increases. c. its horizontal and vertical components are independent of each other. d. the vertical component of a projectile is dependent on its horizontal component. 2. a ball with horizontal speed of 3.5 m/s rolls off a bench at a height of 0.75 m. how long will it take the ball to reach the floor? a. 0.39seconds b. 0.78s c. 2.60s d. 0.15s 3.which of the following pair of angles will produce equal ranges? a. 20° and 70° b. 35° and 65° c. 15° and 85° d. 36° and 44° 4.a projectile was launched into the air and follows a parabolic trajectory. which of the following statements correctly describes the velocity and acceleration of the projectile at the highest point in the trajectory? a. the acceleration is zero, but the velocity is not zero. b. both the velocity and the acceleration are zero. c. the velocity is zero, but the acceleration is not zero d. neither the acceleration nor the velocity are zero 5. which of the following statements best describes impulse? a. it is the product of mass and velocity b. it is the product of the force and time interval c. it is the force divided by time interval d. it is the product of force and velocity 6.calculate the momentum of a 250 kg vehicle that moves with a velocity of 150 m/s to the right. a. 37 500 kg.m/s b. -37 500 kg.m/s c. 3750 kg.m/s d. -3750 kg.m/s 7. a ball is moving at a speed of 15 m/s to the right with a momentum 1 200 N.s. find the mass of the ball. a. 80g b. 80kg c. 18 000g d. 18 000kg 8. a moving object has an initial momentum of 12 000 N.s. it reaches a final momentum of 30 000 N.s. calculate the impulse of the object. a. 18 000N.s b. -18 000N.s c. -42 000N.s d. 42 000N.s 9. which statements is not true about impulse and momentum? a. impulse is equal to change in momentum b. impulse and momentum have the same unit c. impulse and momentum are scalar quantity d. impulse and momentum depends on mass and velocity. 10. which has the most momentum? a. 10kg at 5m/s b. 100kg at rest c. 20kg at 2m/s d. 5kg at 50m/s 11.what happens when the force of impact is extended over a longer period of time? a. the impulse decreases b. the momentum increases c. the impulse increases d. there will be collision 12. if a rocks falls from a cliff, at what point are its kinetic energy and its potential energy the same? ignore air resistance. assume the potential energy is relative to the bottom of the cliff. a. just as it starts to fall b. halfway down c. just before it hits the bottom d. never 13. which energy transformation takes place when charging the battery of a cellphone? a. chemical to mechanical b. electrical to chemical c. chemical to electrical d. electrical to light 14. according to the law of conservation of energy. which of the following is not true? a. energy can't be created or destroyed. b. the total KE + PE of a system is always the same c. energy can transfer from one object to another d. energy can change forms
[tex]\huge\underline{{ANSWERS}}[/tex]
1. which of the following statements is true about projectile motion?
a. as the velocity in the vertical component increases, its corresponding horizontal component also increases.b. as the velocity in the vertical component decreases, its corresponding horizontal component increases.
c. its horizontal and vertical components are independent of each other.
d. the vertical component of a projectile is dependent on its horizontal component.
2. a ball with horizontal speed of 3.5 m/s rolls off a bench at a height of 0.75 m. how long will it take the ball to reach the floor?
a. 0.39seconds
b. 0.78sc. 2.60s
d. 0.15s
3.which of the following pair of angles will produce equal ranges?
a. 20° and 70°
b. 35° and 65°
c. 15° and 85°d. 36° and 44°
4.a projectile was launched into the air and follows a parabolic trajectory. which of the following statements correctly describes the velocity and acceleration of the projectile at the highest point in the trajectory?
a. the acceleration is zero, but the velocity is not zero.
b. both the velocity and the acceleration are zero.c. the velocity is zero, but the acceleration is not zero
d. neither the acceleration nor the velocity are zero
5. which of the following statements best describes impulse?
a. it is the product of mass and velocityb. it is the product of the force and time interval
c. it is the force divided by time interval
d. it is the product of force and velocity
6.calculate the momentum of a 250 kg vehicle that moves with a velocity of 150 m/s to the right.
a. 37 500 kg.m/s
b. -37 500 kg.m/s
c. 3750 kg.m/s
d. -3750 kg.m/s7. a ball is moving at a speed of 15 m/s to the right with a momentum 1 200 N.s. find the mass of the ball.
a. 80g
b. 80kg
c. 18 000gd. 18 000kg
8. a moving object has an initial momentum of 12 000 N.s. it reaches a final momentum of 30 000 N.s. calculate the impulse of the object.
a. 18 000N.s
b. -18 000N.s
c. -42 000N.sd. 42 000N.s
9. which statements is not true about impulse and momentum?
a. impulse is equal to change in momentum
b. impulse and momentum have the same unit
c. impulse and momentum are scalar quantity
d. impulse and momentum depends on mass and velocity.10. which has the most momentum?
a. 10kg at 5m/s
b. 100kg at rest
c. 20kg at 2m/s
d. 5kg at 50m/s11.what happens when the force of impact is extended over a longer period of time?
a. the impulse decreasesb. the momentum increases
c. the impulse increases
d. there will be collision
12. if a rocks falls from a cliff, at what point are its kinetic energy and its potential energy the same? ignore air resistance. assume the potential energy is relative to the bottom of the cliff.
a. just as it starts to fallb. halfway down
c. just before it hits the bottom
d. never
13. which energy transformation takes place when charging the battery of a cellphone?
a. chemical to mechanical
b. electrical to chemicalc. chemical to electrical
d. electrical to light
14. according to the law of conservation of energy. which of the following is not true?
b. the total KE + PE of a system is always the samec. energy can transfer from one object to another
d. energy can change forms
need brainliest please☺
15. ve eter or your answer.1. It is a diverence in electric potential energy in joule coulomb.C. resistanceBourentD. voltage2. What is the Si unit of voltage?A ampereB. o3. It is the number of charges passing through a wire per unit timeC resistanceDotage4. What is the Sunt of currentanderewa5 t is the ocooson to be flow of electric charges as they travel through a conducting wire.CesistanceD. voltage6. What she elecrocueria circuit rasa rastance of 100 and voltage of 120 V?What is the electiones cortas a resistance of 100 D and a voitage of 6.00 V?What is de voltage of a coute has a resistance of 60 and a current of 2 má?that wil hende o meurentne voltage is reduced to one af?c decreased by one haidoblesdecreased by one fourthCalculate the voltage i de cuart dessing rough the wire is 32 and has a resistance of 100
Answer:
1.B
2.B
3.B
4.C
5.C
6.C
Explanation:
