When a train applies brakes, a person sitting on it gets a pushed in _____ direction.

Why in a curvilinear motion of a vehicle the person sitting in it gets an outward jerk?

Why when a bus suddenly, the man sitting in it gets backward jerk?

A block of mass 10 kg kept on a rough horizontal surface can be maintained in uniform motion in a straight line when the force of 50 N is applied to the body in the direction of it’s motion. Find the coefficient of kinetic friction between the surfaces.；

State whether the following assertion is true or false : When a person walks on a rough surface, the frictional force exerted by the surface on the person is opposite to the direction of his motion.

When an apparently healthy person is diagnosed as unhealthy by a psychiatrist, the reason could be that

When a bullet is fired, the man firing gets a jerk on his shoulder, Why?