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# During a rockslide, a 520 kg rock slides from rest down a

## Problem 51 Chapter 8

Fundamentals of Physics | 10th Edition

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Problem 51

During a rockslide, a 520 kg rock slides from rest down a hillside that is 500 m long and 300 m high. The coefficient of kinetic friction between the rock and the hill surface is 0.25. (a) If the gravitational potential energy U of the rockEarth system is zero at the bottom of the hill, what is the value of U just before the slide? (b) How much energy is transferred to thermal energy during the slide? (c) What is the kinetic energy of the rock as it reaches the bottom of the hill? (d) What is its speed then?

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Copyright ©: Hannah Kennedy, Kent State University 1 Chapter 6 1. Energy = the capacity to do work, 2 types a. Potential energy = the stored energy an object can use to do work b. Kinetic energy = energy of motion; energy currently being used by an object c. Energy can be found in different forms such as...

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