A-LevelPhysicsDynamics9702/12 · Feb/Mar 2022 · Q71 Mark
A single horizontal force F is applied to a block X which is in contact with a separate block Y, as shown. [Figure 7.1] The blocks remain in contact as they accelerate along a horizontal frictionless surface. Air resistance is negligible. X has a greater mass than Y. Which statement is correct?
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.
AThe acceleration of X is equal to force F divided by the mass of X.
BThe force that X exerts on Y is equal to F.
CThe force that X exerts on Y is less than F.
DThe force that X exerts on Y is less than the force that Y exerts on X.
✓ Correct answer
C: The force that X exerts on Y is less than F.
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