15kg rock falls from the top of a building 8m high. Find its PE and KE. (a) when at rest at the top of the building (b) halfway down the ground (c) when it reaches the ground (d) what is its speed when it reaches the ground?

15kg rock falls from the top of a building 8m high. Find its PE and KE. (a) when at rest at the top of the building (b) halfway down the ground (c) when it reaches the ground (d) what is its speed when it reaches the ground?

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter11: Energy And Its Conservation

Section: Chapter Questions

Problem 83A

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A 15kg rock falls from the top of a building 8m high. Find its PE and KE. (a) when at rest at the top of the building (b) halfway down the ground (c) when it reaches the ground (d) what is its speed when it reaches the ground?

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