Under what conditions a body becomes weightless?
Weight of a body is nothing but the force with which it is attracted towards the centre of earth.
Force = Mass × Acceleration
W = m × g
Since, we have Force = Weight = W and acceleration is acceleration due to gravity or g.
A body becomes weightless when g becomes zero and this happens when acceleration due to gravity becomes zero and thus body becomes weightless.
Example:
At centre of earth, far away from earth’s surface, freely falling body