Physics · May / June 2022 · Paper 12 · Question 7

The diagram shows a uniform solid rectangular block of weight 50 N that is pivoted about point P. The height of the block is 40 cm. The base of the block is 8.0 cm wide. [diagram: block with force F applied horizontally at top, weight 50 N acting downwards at centre, height 40 cm, base 8.0 cm wide, pivot at point P at bottom right corner] Which horizontal force F just makes the block start to rotate about P?

1. A2.5 N
2. B5.0 N
3. C10 N
4. D160 N

As printed in the paper