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chmereaustin1
24.10.2020 •
Physics
6. A 500 newton man jumps off a bridge and the earth pulls him toward the water 30 meters below. How much work did the earth do?
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Ответ:
Ответ:
0.466 J
Explanation:
We are given that
Mass of car=m=0.05 kg
Initial velocity of care,u=0
Height of car from the bottom of hill=h=0.95 m
Potential energy of car=![mgh](/tpl/images/0309/1180/5cab7.png)
Using the formula
Potential energy of car=![0.05\times 0.95\times 9.81=0.466 J](/tpl/images/0309/1180/99c48.png)
Loss of potential energy=Kinetic energy
Kinetic energy of the car when it reaches the bottom of the hill=0.466 J