Question

inclass-ME conservation-Wed, 10/25/2017 PM Name A stone of mass 0.75 kg is carried from the ground to the roof of a 25 m tall building. The stone is then dropped from the roof and falls to the ground along a path that is vertical only. Consider the ground as the zero point of potential energy. 1. What is the total ME of the stone at rest on the ground before it is carried to the roof? 2. What is the amount of work done carrying the stone from the ground to the roof? 3. What is the total ME of the stone on the roof? 4. What is the ratio of the KE to the PE (i.e. KE/PE) of the stone when it is falling to the ground and is ½ of the way from the roof to the ground? 5, what is the velocity of the stone when it is of the way down from the roof to the ground? 6. What is the velocity of the stone the instant before it strikes the ground after its fall from the roof? 7. What is the total ME of the stone at rest on the ground once it falls from the roof? What is the change in the ME from the roof to when the stone has fallen to the ground and is at rest? 8. What happened to the lost ME from when the stone fell from the roof and came to rest on the ground? 9.

Answer 1

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