Q.
The angular speed of earth, so that the object on equator may appear weightless, is (g=10 m/s2, radius of earth 6400 km)
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a
1.25×10−3rad/sec
b
1.56×10−3rad/sec
c
1.25×10−1rad/sec
d
1.56 rad/sec
answer is A.
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Detailed Solution
For condition of weightlessness of equator ω=gR=1800=1.25×10−3rads
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