Circular Motion: Earth Rotation Effect MCQ

Solve this quality-checked JEE multiple-choice question, then review the correct answer and explanation.

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Earth Rotation EffectHardQuestion 30615

Question

Due to Earth's rotation, the effective value of g at the equator is:

A
Greater than at poles
B
Less than at poles
Correct
C
Same as at poles
D
Equal to zero

Correct answer

Less than at poles

Explanation

At the equator, part of gravity provides centripetal acceleration for Earth's rotation: g_eff = g − ω²R. This reduces effective g at the equator. At poles, there's no rotation effect, so g_eff = g (maximum).

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