Physics 9702 · AS & A Level · Energy conservation

Energy conservation — practice question

A box travels down a rough ramp. The box’s gravitational potential energy changes by $16\ \text{J}$ as it moves from position X to position Y. At X, the box has kinetic energy of $24\ \text{J}$, and at Y it has kinetic energy of $35\ \text{J}$. How much work is done against the frictional force?

  • A$5\ \text{J}$
  • B$19\ \text{J}$
  • C$27\ \text{J}$
  • D$43\ \text{J}$

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