If the Earth has no rotational motion

PHYSICS · Single correct · CBSE · Physics · Laws of Motion · Laws of Motion

Problem

If the Earth has no rotational motion, the weight of a person on the equator is W. Determine the speed with which the earth would have to rotate about its axis so that the person at the equator will weight 34W\frac{3}{4}W . Radius of the Earth is 6400 km and g=10 m/s2g = 10 \text{ m/s}^2 . (1) 1.1×10−3 rad/s1.1 \times 10^{-3} \text{ rad/s} (2) 0.83×10−3 rad/s0.83 \times 10^{-3} \text{ rad/s} (3) 0.63×10−3 rad/s0.63 \times 10^{-3} \text{ rad/s} (4) 0.28×10−3 rad/s0.28 \times 10^{-3} \text{ rad/s}

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