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Question

The weight of a body at a specific place is 20 N. The acceleration due to gravity at that point is 10 ms2. What is the mass and weight of the object at the centre of Earth?

A
2 kg,0 N
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B
2 kg,20 N
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C
2 kg,2 N
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D
2 kg,10 N
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Solution

The correct option is A 2 kg,0 N
Given,
Weight, W=20 N,
Acceleration due to gravity g=10 ms2
Weight is given by: W=mg
where m is the mass of the body.
m=2010 kg=2 kg

Mass is the measure of the amount of substance in a body. It remains same all over the universe.

Weight varies as per acceleration due to gravity. Acceleration due to gravity at the center of earth is zero and hence, weight at the center of earth is also zero.

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