Work
 

Work problem 26


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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