A-LevelPhysicsDynamicsMay/June 2018Paper 1 Q81 Mark
A tennis ball of mass 55g is travelling horizontally with a speed of 30ms⁻¹. The ball makes contact with a wall before rebounding in the horizontal direction with a speed of 20 ms⁻¹. The ball is in contact with the wall for a time of 5.0 × 10⁻³s. What is the average force exerted on the wall by the ball?
A110 N
B220 N
C330 N
D550 N
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The correct answer is D. 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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