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- 1. Multiple Choice
Objects P and Q are initially at rest at time t = 0
The same resultant force F is applied to P and Q for time T.
The mass of P is 10 times greater than the mass of Q.
What is the ratio
0.1
1
10
100
- 2. Multiple ChoiceAt which point(s) on the roller coaster is the gravitational potential energy at its maximum?ABCD
- 3. Multiple ChoiceAt which point(s) on the roller coaster is the kinetic energy at its maximum?ABCD
- 4. Multiple ChoiceIn diagram 2, if the mass of the car is 600 kg, what is the change in potential energy from point A to point B?411,600 J294,000176,400 J117,600 J
- 5. Multiple ChoiceIn diagram 2, if the 600 kg cart is initially at rest, what is its velocity at point B?19.8 m/s15.0 m/s10.3 m/s3.8 m/s
- 6. Multiple Choice
1. A ball has a 17 J of kinetic energy and its mechanical energy is 25 J. If the ball has a mass of 3.2 kg, what is its height above the ground?
0.26 m
0.52 m
5.2 m
25 m
- 7. Multiple Choice
The given graph shows the relation between gravitational potential energy & height . If the total energy at height A= 0.49 J, what is the kinetic energy?
0.10 J
0.01 J
0.5 J
0.49 J
- 8. Multiple Choice
What is the GPE at point A
14 J
12 J
6 J
8 J
- 9. Multiple Choice
What is the KE at point B?
14 J
12 J
6 J
8 J
- 10. Multiple Choice
What is the Total Energy of the system?
14 J
12 J
6 J
8 J
- 11. Multiple Choice
What is the KE at point D?
14 J
12 J
6 J
8 J
- 12. Multiple Choice
What is the GPE at point E?
14 J
12 J
6 J
8 J
- 13. Multiple Choice
What is the Kinetic Energy at point B?
500,000 J
400,000 J
300,000 J
50,000 J
- 14. Multiple Choice
What is the Kinetic Energy at point C?
500,000 J
400,000 J
300,000 J
50,000 J
- 15. Multiple Choice
What is the Kinetic Energy at point D?
500,000 J
250,000 J
300,000 J
50,000 J
- 16. Multiple Choice
What is the GPE at point E?
500,000 J
250,000 J
300,000 J
100,000 J
- 17. Multiple Choice
What is the GPE at point F?
500,000 J
250,000 J
300,000 J
0 J
- 18. Multiple Choice
What is the KE at point F?
500,000 J
250,000 J
300,000 J
0 J
- 19. Multiple Choice
What is the Total Energy at the top?
15,000 J
3,750 J
7,500 J
11,250 J
- 20. Multiple Choice
What is the KE 1/4th of the way down?
15,000 J
3,750 J
7,500 J
11,250 J
- 21. Multiple Choice
What is the KE 1/2 of the way down?
15,000 J
3,750 J
7,500 J
11,250 J
- 22. Multiple Choice
What is the KE 3/4th of the way down?
15,000 J
3,750 J
7,500 J
11,250 J
- 23. Multiple Choice
What is the KE at the bottom?
15,000 J
3,750 J
7,500 J
11,250 J
- 24. Multiple Choice
What is the GPE at the top?
50 J
25 J
0 J
100 J
- 25. Multiple Choice
What is the KE half way down?
50 J
25 J
0 J
100 J
- 26. Multiple Choice
What is the Total Energy at the bottom?
50 J
25 J
0 J
100 J
- 27. Multiple ChoiceThe difference between a car hitting a wall vs. a car hitting a hay stack isthe Impulse on the car hitting the wall is greaterthe change in momentum of the car hitting the wall is greaterthe force on the car hitting the hay stack is greaterthe collision time of the car hitting the hay stack is greater
- 28. Multiple ChoiceEnergy is lost during this type of collisionelasticinelasticenergy is lost in both types of collisions
- 29. Multiple ChoiceAn open cart on a level surface is rolling without frictional loss through a vertical downpour of rain. As the cart rolls, an appreciable amount of rainwater accumulates in the cart. The speed of the cart willincrease because of conservation of mechanical energydecrease because of conservation of momentumdecrease because of conservation of mechanical energyremain the same because the raindrops are falling perpendicular to the direction of the cart's motion
- 30. Multiple Choice
A pendulum oscillates as shown. At which of the following positions is the kinetic energy equal to the total energy?
A
B
C
Not enough information given.
- 31. Multiple ChoiceThe units for momentum arekgm/skg-m/skg/m/s
- 32. Multiple ChoiceThe units for Impulse areN/sN-sNm/s
- 33. Multiple Choice
A mass of 2.5 kg is released from rest at X and slides down a ramp, of height 3.0 m, to point Y as shown.
When the mass reaches Y at the bottom of the ramp it has a velocity of 5.0 m s–1.
What is the average frictional force between the mass and the ramp?
8.5 N
10.6 N
14.7 N
24.5 N
- 34. Multiple Choice
Two bodies of different masses undergo an elastic collision in the absence of any external force.
Which row gives the effect on the total kinetic energy of the masses and the magnitudes of the forces exerted on the masses during the collision?
A
B
C
D
- 35. Multiple Choice
A continuous stream of water falls through a vertical distance of 100 m. Assume no thermal energy is transferred to the surroundings. The specific heat capacity of water is 4200 J kg–1 K–1.
What is the temperature difference of the water between the top and bottom of the waterfall?
0.023 K
0.23 K
2.3 K
4.3 K
- 36. Multiple Choice
Two unpowered toy cars, P and Q, are released from rest from X and travel down the track to Y. Car P has twice the mass of car Q. There is negligible friction.
What quantity is the same for car P and car Q?
The gravitational potential energy at X.
The accelerating force at X.
The velocity when they arrive at Y.
The momentum when they arrive at Y.
- 37. Multiple Choice
A roller coaster car is raised to a height of 65 m and released from rest
What is the maximum possible speed of the car?
11 m s−1
25 m s−1
36 m s−1
130 m s−1
- 38. Multiple Choice
The nucleus of a radioactive isotope X is at rest and decays by emitting an α particle so that a new nuclide Y is formed.
Which one of the following statements about the decay is correct?
The momentum of Y is equal and opposite to the momentum of the α particle.
The momentum of Y is equal to the momentum of X.
The kinetic energy of Y is equal to the kinetic energy of the α particle.
The total kinetic energy is the same before and after the decay.
- 39. Multiple Choice
A car of mass M travelling at speed V comes to rest using its brakes. Energy is dissipated in the brake discs of total mass m and specific heat capacity c. The rise in temperature of the brake discs can be estimated from
- 40. Multiple Choice
A raindrop of mass m falls to the ground at its terminal speed v. The specific heat capacity of water is c and the acceleration of free fall is g. Given that 25% of the energy is retained in the raindrop when it strikes the ground, what is the rise in temperature of the raindrop?
- 41. Multiple Choice
A stone is projected horizontally by a catapult consisting of two rubber cords. The cords, which obey Hooke’s law, are stretched and released. When each cord is extended by x, the stone is projected with a speed v. Assuming that all the strain energy in the rubber is transferred to the stone, what is the speed of the stone when each cord is extended by 2x?
v
2v
4v
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