A-LevelPhysicsDynamicsMay/June 2012Paper 1 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?
A1.4 ms⁻²
B1.7 ms⁻²
C2.0 ms⁻²
D2.5 ms⁻²
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The correct answer is A. This question tests the candidate's understanding of dynamics within the Physicssyllabus. The examiner's mark scheme requires...
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Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
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