O-LevelPhysicsForces5054/12 · May/June 2023 · Q111 Mark
A uniform beam is pivoted at its midpoint. An object weighing 40 N is placed on the beam 20 cm to the left of the pivot as shown. Which force and position balances the system?
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A20 N acting downwards, 40 cm to the right of the pivot
B20 N acting upwards, 40 cm to the right of the pivot
C50 N acting downwards, 10 cm to the left of the pivot
D50 N acting upwards, 10 cm to the left of the pivot
✓ Correct answer
A: 20 N acting downwards, 40 cm to the right of the pivot
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