Physics · Oct / Nov 2022 · Paper 12 · Question 6

A block of wood is placed on a table. External forces act on the block but the block remains stationary. A student suggests three conditions for the block to remain stationary. condition P The resultant force on the block must equal zero. condition Q The resultant moment on the block must equal zero. condition R The external forces must act through the centre of mass of the block. Which conditions are necessary for the block to remain stationary?

1. AP and Q only
2. BP and R only
3. CQ and R only
4. DP, Q and R

As printed in the paper