Underline the correct alternative :- When a conservative force does positive work on a body, the potential energy of the body `increases//decreases//remains unaltered`.

Underline the correct alternative :- Work done by a body against friction always results in a loss of its kinetic // potential energy.

Underline the correct alternative :- In an inelastic collision of two bodies, the quantities which do not change after the collision are the total kinetic energy//total linear momentum//total energy of the system of two bodies.

When centripetal force acts on a body towards centre of the circle,why does the body not move towards the centre?

If net force acting on a body is zero, then will the body remain necessarily in rest position?

An isolated conducting sphere is given a positive charge. Does its mass increases, decreases or remains the same?

Which of the following change is observed occurs when a substance X is converted from liquid to vapour phase at the standard boiling point? I. Potential energy of the system decreases II. The distance between molecules increases III.The average kinetic energy of the molecules in both phases are equal

When a person lift a body from the ground,work done by the lifting force is :