Weight of a body is less in the mines. Why?
The weight of a body is less in the mines because when we move deeper the earth gravity decreases but our mass is always constant.
What is gravitational force? Write its SI unit.
Gravitational force is the force of attraction by which a body is attracted towards the center of the earth or any other havenly bodies if the body is on or near the surface.
Its SI unit is Newton (N).