Physics (AS & A Level) · May / June 2025 · Paper 11 · Question 18

The points X, Y and Z are on a rough, horizontal surface. A box P is pushed across the surface from X to Y and then from Y to Z. The distance from X to Y is 3.0 m. The work done against the frictional force in moving the box from X to Y is 150 J. The work done against the frictional force in moving the box from Y to Z is 200 J. An identical box Q is pushed in a straight line from X to Z. The magnitude of the frictional force between the boxes and the surface is constant. How much extra work is done against the frictional force in moving P than Q?

1. A100 J
2. B250 J
3. C350 J
4. D600 J

As printed in the paper