A-LevelPhysicsKinematics9702/12 · May/June 2016 · Q61 Mark
The acceleration of free fall on the Moon is 1.6ms⁻². The Moon has no atmosphere. An astronaut standing on the surface of the Moon drops a feather. Which graph shows the variation with time of the speed of the feather during the first second of its fall?
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Astraight line graph from (0,0) to (1 second, 1.6 m s⁻¹), indicating constant acceleration.
Bcurve starting from (0,0) and curving downwards, reaching (1 second, 1.6 m s⁻¹), indicating decreasing acceleration.
Ccurve starting from (0,0) and curving upwards, reaching (1 second, 1.6 m s⁻¹), indicating increasing acceleration.
Dhorizontal line at speed 1.6 m s⁻¹ from t=0 to t=1 second, indicating constant speed.
✓ Correct answer
A: straight line graph from (0,0) to (1 second, 1.6 m s⁻¹), indicating constant acceleration.
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