1. How far (in meters) must a 100 kg pile driver fall, if it is to do 14000 J of work?

2. A spring whose spring constant is 550 N/m is compressed 0.800 m. What speed (in meters/second) can it give to a 0.400 kg ball when released?

3. A 550 N crate rests on the floor. How much work in joules is required to move it at constant speed 8.0 m along the floor, against a friction force of 150 N?

4. What is the minimum work in joules needed to push a 1310 kg car 44.0 m up a 12.5 degree incline? (Ignore friction.)

5. How much work in joules must be done to stop a 6000 kg car traveling at 150 km/hr?

6. A 1220 kg car rolling on a horizontal surface has a speed of 50 km/hr when it strikes a horizontal coiled spring and is brought to rest in a distance of 3.5 m. What is the spring constant (in N/m) of the spring? (Ignore nonconservative forces such as friction.)

7. A spring has a spring constant "k" of 560 N/m. How much must this spring be compressed (in meters) to store 50 J of energy?

8. Tarzan is running at a top speed of 8.0 m/s and grabs a vine hanging vertically from a tall tree in the jungle. How high (in meters) can he swing upward?

9. An object slides down a frictionless 33 degree incline whose vertical height is 47.0 cm. How fast is it going in meters/second when it reaches the bottom?

10. A 73 kg child descends a slide 7.5 m high and reaches the bottom with a speed of 3.80 m/s. How much thermal energy (in joules) due to friction was generated in this process?

11. Two railroad cars, each of mass 2800 kg and traveling 60.0 km/hr, collide head-on and come to rest. How much thermal energy in joules is produced in this collision?