Two stones, 10kg and 50kg fall through 80m high cliff. Which stone has greater velocity at bottom? (ignoring air resistance) (g=10ms-2)
Correct answer: C. Both have same velocity
- A. 10kg
- B. 50kg
- C. Both have same velocity
- D. Cannot be calculated
Explanation
If we neglect air resistance both objects reach the ground at the same time so their velocity will be the same.
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Acceleration measures the rate at which velocity changes with time, including changes in speed, direction or both. Work includes average and instantaneous acceleration, the relation a = Δv/Δt, uniform acceleration equations, and interpreting velocity time and displacement time graphs, with acceleration carefully distinguished from velocity.
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