Physics

Physics

Problem

A

5\,\text{kg}

mass weighs

46.55\,\text{N}

at some depth below Earth’s surface. Assuming

g = 9.8\,\text{m\,s}^{-2}

at the surface and

R = 6400\,\text{km}

, the depth is closest to a)

160\,\text{km}

b)

640\,\text{km}

c)

320\,\text{km}

d)

1280\,\text{km}

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