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Physics (AS & A Level) · May / June 2026 · Paper 12 · Question 16

9702Equilibrium of forces

Which statement about equilibrium is correct?

  1. AIf a system is in equilibrium then there must be no forces acting on it.
  2. BIf a system is in equilibrium then there must be no resultant torque on it.
  3. CIf there are no moments due to forces acting on a system then it must be in equilibrium.
  4. DIf there is no resultant force acting on a system then it must be in equilibrium.

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Correct answer: B. If a system is in equilibrium then there must be no resultant torque on it.

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