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Q.

The linear velocity of a point on the surface of earth at a latitude of 60° is

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a

$\frac{800}{3} m / \sec$

b

$\frac{800 π}{3} m / \sec$

c

$800 \times \frac{5}{18} m / \sec$

d

$\frac{2000 π}{27} m / \sec$

answer is D.

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Detailed Solution

$v = rω; r = Rcos θ; ω = \frac{2 π}{T}$

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The linear velocity of a point on the surface of earth at a latitude of 60° is