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  4. A spring balance A and a beam balance B are used to weigh the same object at a place on the equator and a place on the pole of the earth. Then

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Q. A spring balance $A$ and a beam balance $B$ are used to weigh the same object at a place on the equator and a place on the pole of the earth. Then

NTA AbhyasNTA Abhyas 2020Gravitation

Solution:

Spring balance measures spring force hence readings of A will be different as g at equator is smaller than g at pole.
Beam balance measures torque hence B will be affected equally due to variation of g at two places.
So readings of B will be same.