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Physics (AS & A Level) · May / June 2022 · Paper 11 · Question 13

9702Equilibrium of forces

A uniform diving board is held by two fixed rods at points P and Q. A person stands at end R of the diving board, as shown. The forces exerted by the rods on the board are vertical. The board remains in equilibrium as the person slowly moves towards point Q from end R. Which row describes the changes to the magnitudes of the forces exerted by the rods on the board?

  1. Aforce at P decreases, force at Q decreases
  2. Bforce at P decreases, force at Q increases
  3. Cforce at P increases, force at Q decreases
  4. Dforce at P increases, force at Q increases

As printed in the paper

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Correct answer: A. force at P decreases, force at Q decreases

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