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The potential energy of an object with a mass of 5kg that is placed 20 meters above the surface of the earth is most nearly ____.
981 Joules
345 Joules
245 Joules
490 Joules
Detailed Explanation
The potential energy of an object is equal to Ep = mgh, where m is the mass, g is the gravitational acceleration constant, and h is the height. The gravitational acceleration is 9.81 m/s2. As a result, we can calculate the potential energy to be: Ep = 5kg * 9.81 m/s2 *20m = 981 Joules.
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