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The angular speed of earth, so that the object on equator may appear weightless (g = 10 m/s2 , is , radius of earth 6400 km)

(a) 1.25×10^-3 rad/sec (b) 1.56 ×10^-3 rad/sec

(c) 1.25×10^-1 rad/sec (d) 1.56 rad/sec

Answer: a

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