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Column-I Column - II

A) Concept of elliptical path 1) at the poles on the surface of earth

B) Gravitational force of attraction 2) Decreases as we go upwards from surface of earth

C) Acceleration due to gravity 3) Kepler’s 1st law

D) Acceleration due to gravity is maximum 4) Kepler’s 2nd law

5) Newton’s Law

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A-3, B-5, C-2, D-1

A-5, B-4, C-5, D-1

A-2, B-4, C-1, D-5

A-1, B-3, C-3, D-4

answer is A.

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Detailed Solution

Keppler's 1st law states that every planet moves around the sun in elliptical orbit keeping the sun at one of its focii.

If Φ be the angle of latitude at a point is g = g_p - ω²Rcos²Φ where g_p = GM / R²

At pole , Φ = 90⁰ , and g is maximum

So option- (1) is right.

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