A 10-kg roller coaster cart starts from rest at height of 140-m. Assuming there is no friction to slow down the car, what is the kinetic energy of the cart when it reaches the bottom of the hill?
A. 0J
B. 13, 720 J
C. 14J
D. 7, 000 J
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Answer:
I think so the answer will be 14j.
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