Physics 9702 · AS & A Level · Energy conservation

Energy conservation — practice question

A puck used in ice hockey, with a mass of $150\,\text{g}$, is travelling at an initial speed of $2.0\,\text{m s}^{-1}$ over the ice-rink surface. It then glides $30\,\text{m}$ in a straight path before coming to rest. What average frictional force acts on the puck?

  • A$0.010\,\text{N}$
  • B$0.020\,\text{N}$
  • C$0.067\,\text{N}$
  • D$0.44\,\text{N}$

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