What is the acceleration of free fall on the moon of that on the Earth ?
Correct answer: A. 1/6th
- A. 1/6th
- B. 1/4th
- C. 1/8th
- D. None of these
Explanation
The Moon's gravitational acceleration is about 1.62 m/s², while Earth's is about 9.8 m/s². Their ratio is 1.62 m/s² ÷ 9.8 m/s² ≈ 0.165, which is approximately 1/6. A common mistake is 1/4th, which does not match the measured ratio of lunar to terrestrial gravity.
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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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