A-LevelPhysicsDynamics9702/12 · May/June 2023 · Q91 Mark
A box in air slides with increasing speed down a rough slope from point P to point Q. [Figure 9.1] The slope surface exerts a constant frictional force on the box. As the box moves from P to Q, there are changes to the magnitudes of its acceleration and the total resistive force acting on it. Which row describes the changes?
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Amagnitude of acceleration: increases, magnitude of total resistive force: decreases
Bmagnitude of acceleration: decreases, magnitude of total resistive force: decreases
Cmagnitude of acceleration: increases, magnitude of total resistive force: increases
Dmagnitude of acceleration: decreases, magnitude of total resistive force: increases
✓ Correct answer
D: magnitude of acceleration: decreases, magnitude of total resistive force: increases
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