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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

(4)

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