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Physics (AS & A Level) · Oct / Nov 2016 · Paper 13 · Question 15

9702Equilibrium of forces

Four beams of the same length each have three forces acting on them. Which beam has both zero resultant force and zero resultant torque acting?

  1. A30 N and 50 N upwards, 90 N downwards; 50 cm and 30 cm spacing
  2. B36 N and 70 N upwards, 106 N downwards; 50 cm and 30 cm spacing
  3. C28 N and 35 N upwards, 63 N downwards; 50 cm and 30 cm spacing
  4. D42 N and 70 N upwards, 112 N downwards; 50 cm and 30 cm spacing

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Correct answer: D. 42 N and 70 N upwards, 112 N downwards; 50 cm and 30 cm spacing

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