Physics

Problem

A block of mass

20\,\text{kg}

is taken to a tunnel

1\,\text{km}

below the Earth’s surface. Take Earth’s radius

R = 6.4\times10^{6}\,\text{m}

and

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

at the surface. What is the weight of the block at that depth? a)

200\,\text{N}

196\,\text{N}

176\,\text{N}

165\,\text{N}