What is the potential energy of a 3.10-kg object at the bottomof a well 12.6 m d

Question

What is the potential energy of a 3.10-kg object at the bottomof a well 12.6 m deep as measured from ground level?____J Explain the sign of the answer___________ A sled and rider with a combined weight of 69 kg are at reston the top of a hill 20 m high. a) What is their total energy at the top of thehill______J b) Assuming there is no friction, what would the total energybe on sliding halfway down the hill____J What is the potential energy of a 3.10-kg object at the bottomof a well 12.6 m deep as measured from ground level?____J Explain the sign of the answer___________ A sled and rider with a combined weight of 69 kg are at reston the top of a hill 20 m high. a) What is their total energy at the top of thehill______J b) Assuming there is no friction, what would the total energybe on sliding halfway down the hill____J

Explanation / Answer

Mass m = 3.1 kg

depth h = 12.6 m

(a). potential energy = -mgh = -382.788 J

(2). mass M = 69 kg

Initial velocity u = 0

Height h = 20 m

Total energy E = Mgh = 13524 J

(b). total energy at half way = E = 13524 J

Since energy remains constant

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