A mine–shaft elevator is below Earth’s surface and is accelerating downward at

PHYSICS · Subjective · CBSE · Physics · Gravitation · Gravitation

Problem

A mine–shaft elevator is

500\,\text{m}

below Earth’s surface and is accelerating downward at

3.0\,\text{m s}^{-2}

. If the mass of a worker standing on the platform is

80\,\text{kg}

, determine the reading of a spring balance attached to the platform. Take

R_E = 6400\,\text{km}

and

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

at the surface.