Physics

Problem

The mass of a miner’s toolbox is

50\,\text{kg}

. Take

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

and Earth’s radius

R = 6.4 \times 10^{3}\,\text{km}

. Calculate its weight when it is lowered to a depth of

4.0 \times 10^{2}\,\text{km}

below the Earth’s surface. Ignore rotational effects. a)

5.2 \times 10^{2}\,\text{N}

4.6 \times 10^{2}\,\text{N}

4.3 \times 10^{2}\,\text{N}

4.9 \times 10^{2}\,\text{N}