Physics (AS & A Level) · Oct / Nov 2022 · Paper 12 · Question 13

A box of length 12 cm and weight 0.43 N is placed on a horizontal table, with the greater part of its length overhanging the edge of the table. The edge of the table acts as a pivot. The centre of gravity of the box is at its geometric centre. To balance the box, a uniform sphere of diameter 2.4 cm is placed inside the box, touching one end, as shown. Assume that the forces acting on the box are in the plane of the diagram. What is the minimum mass of the sphere that is needed to maintain the system in equilibrium?

1. A0.066 kg
2. B0.13 kg
3. C0.22 kg
4. D1.3 kg

As printed in the paper