Physics (AS & A Level) · Oct / Nov 2019 · Paper 12 · Question 11

A rigid uniform bar of length 2.4 m is pivoted horizontally at its midpoint. [diagram: bar with 200 N weight hung 0.8 m to the left of the pivot and 300 N weight hung 0.8 m to the right of the pivot] Weights are hung from two points on the bar as shown in the diagram. To maintain equilibrium, a couple is applied to the bar. What is the torque and direction of this couple?

1. A40 N m clockwise
2. B40 N m anticlockwise
3. C80 N m clockwise
4. D80 N m anticlockwise

As printed in the paper