Energy and its Conservation

Energy and its Conservation problem 27

A body with mass slides first on a smooth surface and then encounters a belt of rough surface (see figure).

Body on a rough surface

The graph shows how the speed of the body changes over time as it slides.

Graph of a body velocity against time

  • What is the length of the rough surface?

  • How much work does the friction force do?

  • What is the coefficient of friction between the rough surface and the body?


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