1. How much Gravitational Potential Energy does an 85 kg hiker have if she climbs to the top of a 100-meter tall hill?
   1. 98 J
   2. 850 J
   3. 83300 J
   4. 708,050 J

1. What requires more energy?

i) Lifting a 50 kg sack vertically 2 meters

ii) Lifting a 25 kg sack vertically 4 meters

1. Lifting the 50 kg sack
2. Lifting the 25 kg sack
3. Both require the same amount
4. Cannot be determined without more information

1. What is the kinetic energy stored in a 250 kg car traveling at 20 m/s?
   1. 2,500 J
   2. 5,000 J
   3. 25,000 J
   4. 50,000 J

1. What does the following LOL diagram tell you about the behavior of the object?

1. The object is speeding up
2. The object is slowing down
3. The object is being dropped
4. The object is compressing a spring

1. It takes 40 J of work to push a large box 4 m across a floor. Assuming that the push is in the same direction as the box's displacement, what is the size of the net force on the box?
   1. 4 N
   2. 10 N
   3. 40 N
   4. 160 N

1. If 50 N of force is required to compress a spring by 0.25 m, what is the value of the spring constant?
   1. 200 N/m
   2. 400 N/m
   3. 800 N/m
   4. 1600 N/m

1. How much potential energy is stored in the spring from question 6 once it is compressed? Use the spring constant you calculated in question 6.
   1. 5 J
   2. 6.25 J
   3. 7.5 J
   4. 8.75 J

For questions #8-9, consider the following scenario and diagram:

Two balls (A and B) ofequal mass are released from rest at the heights indicated on the diagram.

1. Compare the E_g of B to the E_g of A. The E_g of B is ___________________ the E_g of A.
   1. Equal to
   2. 2 times greater than
   3. 2 times less than
   4. 4 times greater than

1. Compare the E_g of B at the top to the E_k of B right before it hits the ground. The E_g of B is _________ the E_k of B.
   1. Greater than
   2. Less than
   3. Equal to
   4. Not enough information to solve the problem

For Questions #10 - #11, consider the following scenario and diagram:

Two balls (A and B) are dropped from the same height. Ball B hastwice the mass of Ball A, but roughly the same shape.

1. Compare the E_g of B to the E_g of A. The E_g of B is ___________________ the E_g of A,.
   1. Equal to
   2. 2 times greater than
   3. 2 times less than
   4. 4 times greater than

1. Compare the E_k of B to the E_k of A right before both hit the ground. The E_k of B is _________ the E_k of A.
   1. Greater than
   2. Less than
   3. Equal to
   4. Not enough information to solve the problem

1. You pull a wagon (initially at rest) until it reaches a constant velocity along a level sidewalk. The LOL diagram for the situation can be best explained by which of the following statements?

1. Energy is conserved.
2. Work is being done on the system.
3. The system is losing energy due to work.
4. It is impossible to explain without knowing thermal energy.