Q.

A box weighs 196 N on a spring balance at the north pole. Its weight (in Newton) recorded on the same balance if it is shifted to the equator is_____  (Take g=10ms2  at the north pole and the radius of the earth = 6400km)(Round off to the nearest integer)

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answer is 195.

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Detailed Solution

weight at equator = mg'  
=m(gω2R)mg=196Nm=19.6kgmg'=19.6[10(2π24×3600)2×6400×103]N=19.6[100.034]=195.33N

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A box weighs 196 N on a spring balance at the north pole. Its weight (in Newton) recorded on the same balance if it is shifted to the equator is_____  (Take g=10 ms−2  at the north pole and the radius of the earth = 6400km)(Round off to the nearest integer)