5. A bike rider approaches a hill with a speed of 8.5m/s. The total mass of the bike and rider is 85kg.
a. Find the kinetic energy of the bike and rider before going up the hill.
b. The rider coasts up the hill. Assuming there is no friction, at what height will the bike come to a stop?
c. Does your answer depend on the mass of the bike and rider? Explain.
6. A 5 kg bowling ball is dropped from the top of a 50 m high building.
A) How much potential energy does the bowling ball have before it is dropped?
B) How fast will it be moving when it hits the ground?
7. An 80.0 kg student running at 3.5 m/s grabs onto a rope that it hanging vertically.
a. How much kinetic energy does the student have prior to grabbing the rope?
b. How high will the student swing?
8. Tarzan, mass 85kg, swings down from a tree limb. His feet touch the ground 4.0 m below the limb. How fast was Tarzan moving when he hit the ground?
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