A-level · Work, energy & power

Work done by a forceExam-style questions

The work done by a constant force, W = Fd when the force is along the motion and W = Fd cosθ when it acts at an angle, together with work done against gravity and against resistance — and the sign convention that makes a force opposing the motion do negative work.

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19 questions · A Level level · mark scheme and worked solution on each · no sign-up to try

DifficultyAllLevel 1Level 2Level 3Level 4Level 5
  1. 1
    A horizontal force of 20 N20\text{ N} pulls a box a distance of 5 m5\text{ m} across a horizontal floor, in the direction of the force. Find the work done by the force. (2 marks)
    Level 1 · 2 marksTry it
  2. 2
    A constant horizontal force of 45 N45\text{ N} pushes a trolley 8 m8\text{ m} across a smooth horizontal floor.

    Find the work done by the force. (2 marks)
    Level 1 · 2 marksTry it