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2. A 50kg gymnast jumps off of the balance beam with an upward velocity of 5...

2. A 50kg gymnast jumps off of the balance beam with an upward velocity of 5 m/s and hits the ground moving at a speed of 10 m/s.

a. How much kinetic energy does the gymnast have when she first jumps off the balance beam?

b. How much kinetic energy does the gymnast have at her peak height?

c. How much work did the Earth do on the girl from when she first jumped, to her peak height?

d. How much kinetic energy does the girl have right before she hits the floor?

e. How much work did the Earth do on the girl from when she jumps off the balance beam to right before she hits the floor?

f. How much work did the floor do stop the girl when she hits it?

h. How high was the balance beam?

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