Does a single external force acting on a particle necessarily change its kinetic energy? Explain.

Write the expresion for Lorentz force acting on a charged particle.

If the net external force acting on a body is zero, then the body at rest continues to remain at rest and a body in motion continues to move with uniform motion. What is the name given to this property of the body?

Can an object have kinetic energy even if its momentum is zero? Explain.

A freely falling object eventually stops on reaching the ground. What happens to its kinetic energy?

The internal energy of a perfect gas does not change during

Define moment of inertia of a body capable of rotation about an axis. Show that the moment of inertia of a body an axis is numerically equal to twice its kinetic energy if it rotates with unit angular velocity.

Show that work done on a body or by the body is equal to the net change in its kinetic energy.