Pseudo force and application of it

Pseudo force is

Pseudo force is applied in

Assertion: Pseudo force is an imaginary force which is recongnised only by a non-inertial observer to explain the physical situation according to newton's laws. Reason: Pseudo force has no physical origin, that is it is not caused by one of the basic interactions in nature. It does not exist in the action-reaction pair.

Pseudo force also called fictitious force such as centrifugal force arises only in

A man of mass m is standing on a lift which moves down with an upward acceleration a. Find the pseudo force acting on the man as observed by himself. Find the pseudo force acting on the man if the lift falls freely.

Give one practical application of magnetic force.