A-LevelPhysicsDynamics9702/12 · May/June 2012 · Q131 Mark
A box of mass 8.0 kg rests on a horizontal, rough surface. A string attached to the box passes over a smooth pulley and supports a 2.0 kg mass at its other end. [Figure 13.1] When the box is released, a frictional force of 6.0 N acts on it. What is the acceleration of the box?
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
A1.4 ms⁻²
B1.7 ms⁻²
C2.0 ms⁻²
D2.5 ms⁻²
✓ Correct answer
A: 1.4 ms⁻²
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