Q 1. How does friction affect the mechanical energy of a system? Q 2. A roller coaster is at the stop of a hill and rolls to the top of a lower hill. If mechanical energy is constant, then on the top of which hill is the kinetic energy from the roller coaster motion greater?

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10 May, 03:16

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Kinley Rhodes · Answer 1

Friction lowers (decreases) the kinetic energy which in turn decreases the mechanical energy of a system. At the top of the second hill.