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Question

What is the weight of a block of mass 5 kg at the centre of the Earth? (g=9.8 m s2)

A
50 N
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B
100 N
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C
Zero
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D
150 N
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Solution

The correct option is C Zero
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.

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