Physics 9702 · AS & A Level · Energy conservation

Energy conservation — practice question

A body of mass $0.30\,\text{kg}$ is projected vertically upwards from the ground with an initial speed of $8.0\,\text{m s}^{-1}$. It attains a greatest height of $1.9\,\text{m}$. Determine how much work is done against air resistance while the body rises to this maximum height?

  • A$4.0\,\text{J}$
  • B$5.6\,\text{J}$
  • C$9.6\,\text{J}$
  • D$15\,\text{J}$

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