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9 January, 03:13

A kiddie roller coaster car has a mass 100 kilograms. At the top of a hill, it's moving at a speed of 3 meters/second. After reaching the bottom of the hill, its speed doubles. The car's kinetic energy at the bottom is its kinetic energy at the top. The car has joules of kinetic energy at the bottom of the hill.

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  1. 9 January, 03:53
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    The cars kinetic energy is double at the bottom, the car has 450 joules of kinetic energy at the bottom of the hill.
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