A Levels Physics (9702)•9702/11/O/N/22

Explanation
Torque equilibrium for horizontal rod Steps:
- Identify pivot at attachment point Q, 25 cm from X (lever arm XQ = 0.25 m) and 50 cm from Y (lever arm QY = 0.5 m).
- Weight W = 11 × 9.8 = 107.8 N acts downward at Y.
- For rotational equilibrium about Q, upward force F at X produces counterclockwise torque F × 0.25 = clockwise torque W × 0.5.
- Solve: F = (0.5 / 0.25) × 107.8 = 215.6 N; vertical force balance T + F = W gives T negative, impossible for string tension. Not enough information to resolve configuration without diagram showing string orientations or mass attachment details.
Final answer: Not enough information.
Topic: Turning effects of forces
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