A brick lies perilously close to the edge of the flat roof of a building. The roof edge is 50 ft above street level, and the brick has 350.0 J of potential energy with respect to street level. Someone edges the brick off the roof, and it begins to fall. What is the brick’s kinetic energy when it is 35 ft above street level?
A brick lies perilously close to the edge of the flat roof of a building. The roof edge is 50 ft above street level, and the brick has 350.0 J of potential energy with respect to street level. Someone edges the brick off the roof, and it begins to fall. What is the brick’s kinetic energy when it is 35 ft above street level?
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Question
A brick lies perilously close to the edge of the flat roof of a building. The roof edge is 50 ft above street level, and the brick has 350.0 J of potential energy with respect to street level.
Someone edges the brick off the roof, and it begins to fall. What is the brick’s kinetic energy when it is 35 ft above street level?
Expert Solution
Introduction:
We are given potential energy. We are also given height of roof. We first find the mass of the brick. We then find the change in potential energy for given height. From energy conservation, change in potential energy is converted to kinetic energy of the brick.
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Follow-up Question
What is the brick’s kinetic energy the instant before it hits the street surface?
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