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anyanavicka [17]
3 years ago
8

At what distance will the weight of a body be halved , Earth's radius=6.4×10^6

Physics
1 answer:
Sholpan [36]3 years ago
5 0

A body of mass m has weight

F = GMm/r²

on the surface of the Earth, where G is the universal gravitational constant, M is the mass of the Earth, and r is it's radius.

If the weight is to be halved, then we have

1/2 F = 1/2 GMm/r² = (1/√2)² GMm/r² = GMm/(√2 r²)

so the distance between the body and the planet's center needs to be

√2 × 6.4 × 10⁶ m ≈ 9.1 × 10⁶ m

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