Change In Potential Energy

Assertion : When two positive point charges move away from each other, then their electrostatic potential energy decreases. Reason : Change in potential energy between two points is equal to the work done by electrostatic forces.

Assertion : When two positive point charges move away from each other, then their electrostatic potential energy decreases. Reason : Change in potential energy between two points is equal to the work done by electrostatic forces.

Match the following : {:(,"Column-I",," Column-II"),("(A)","Work done by all the forces",,"(P)Change in potential energy"),("(B)","Work done by conservative forces",,"(Q) Change in kinetic energy"),("(C)","Work done by external forces",,"(R) Change in mechanical energy"),(,,,"(S) None"):}

Assuming that the gravitational potential energy of an object at infinity is zero, the change in potential energy (final-initial) of an object of mass m, when taken to a height h from the surface of earth (of radius R), is given by,

Assuming that tha gravitational potential energy of an object at infinity is zero, the change in potential energy (final - initial) of an object of mass m, when taken to a height h from the surface of earth (of radius R), is given by

A small mass m starts from rest and slides down the smooth spherical surface of F. Assume zero potential energy at the top. Find (a) the change in potential energy, (b) the kinetic energy, (c) the speed ot the mass as a function of the angle theta made by the radius through the mass with the vertical.

A small mass m starts from rest and slides down the smooth spherical surface of F. Assume zero potential energy at the top. Find (a) the change in potential energy, (b) the kintic energy, (c) the speed ot the mass as a function of the angle theta made by the radius through the mass with the vertical.

A : The potential energy of a system increases when work is done by conservative force. R : Kinetic energy can change into potential energy and vice-versa.