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प्रश्न
The value of gravitational acceleration (g) is ______.
विकल्प
highest at the poles.
highest at the equator.
same everywhere on the surface of the earth.
lowest at the poles.
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उत्तर
The value of gravitational acceleration (g) is highest at the poles.
Explanation:
Earth is an oblate spheroid so the polar radius is smaller, giving a larger `(GM)/R^2` at the poles. Also, Earth's rotation produces a centrifugal effect that reduces the effective g most at the equator.
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