Physics (AS & A Level) · May / June 2025 · Paper 13 · Question 12

A non-uniform bar PQ has length 50 cm and weight 200 N. A block of weight 400 N is attached to the top of the bar at its centre. The bar rests on horizontal ground. A vertical force of 360 N is now exerted upwards on the bar at end Q and is just sufficient to lift end Q from the ground. What is the distance from the centre of gravity of the bar to end P?

1. A0.050 m
2. B0.10 m
3. C0.25 m
4. D0.40 m

As printed in the paper