Question

what is pseudo force?

Answer 1

it is an apparent force that act on all masses whose motion is described using a non inertial of reference

Answer 2

puedo force can be defined as a physical apparent but non existent force felt by an observer in a non inertial frame .i.e a frame which is accelerating . as we know Newton 's law of motion are applicable only one in inertial frame not in non inertial frame .