A sled and rider with a combined mass of 50kg are at the top of a hill that is 15m above the level ground. The sled is given a push providing an initial kinetic energy at the top of the hill of 1600J.(adsbygoogle = window.adsbygoogle || []).push({});

A: choosing a reference level at the bottom of the hill what is the potential energy of the sled and rider at the top of the hill?

B: After the push what is the total mechanical energy of the sled and rider at the top of the hill?

C: If friction is ignored what will be the kinetic energy of the sled and rider at the bottom of the hill?

So far I have this..and I'm not sure if it's right.

PE=mgh PE= (50kg)*(9.8m/sec squared)*(15m) = 7350J

E=PE+KE 1600J+7350J = 8950J

after that I'm not really sure. Any help is greatly appreciated!

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# Homework Help: Potential and Kinetic energy and a sled

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