Questions
A box weighs 196N on a spring balance at the north pole. Its weight recorded on the same balance if it is shifted to the equator is close to(Take g = 10 at the north pole and the radius of the earth = 6400km)
detailed solution
Correct option is C
At pole, weight =mg=196 ⇒m=19.6kg At equator, weight =mg−mω2R =196−19.62π864002×6400×103=196-19.6(39.44)64000007464960000=196-0.663=195.32NTalk to our academic expert!
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The angular speed of earth, so that the object on equator may appear weightless, is , radius of earth 6400 km)
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