What is the weight of a block of mass 5kg at the centre of the Earth? (g=9.8ms−2)
A
150N
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B
100N
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C
50N
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D
Zero
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Solution
The correct option is DZero Weight of an object is the force acting on it due to gravity of the Earth. W=mg
But, g (i.e. acceleration due to gravity) is zero at the centre of the Earth. Therefore the weight of the block would be zero at the centre of Earth.