What should be the angular speed of earth, so that body lying on equator may appear weightlessness ( g = 10 m/s2, R=6400 km )
(a) 1/800 rad/s (b) 1/400 rad/s
(c) 1/600 rad/s (d) 1/100 rad/s
Answer: a
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a