(A) 1.0 J
(B) 9.8 J
(C) 2.0 J
(D) 20 J
A body has potential energy=mgh, when it is height h from the ground, at the point at the distance x below from top its potential energy will be?
(A) Mgx
(B) Mgh
(C) Mg(h+x)
(D) Mg(h-x)
Choice of zero potential energy level is?
(A) At infinity
(B) Surface of earth
(C) Just above the surface of earth
(D) Arbitrary
Heat is a?
(A) Fixed quantity
(B) Scalar quantity
(C) Vector quantity
(D) None of the above
When a metcor enters into earth atmosphere the energy converts into?
(A) Heat energy
(B) Potential energy
(C) Kinetic energy
(D) Nuclear energy
If we go above the surface of earth, the gravitational force?
(A) Becomes zero
(B) Remains constant
(C) Varies inversely to the square of the distance
(D) Varies directly to the square of the distance
Work done by the gravitational force in displacing the object from a point to infinity, where the force of gravity become zero is called?
(A) Electric potential energy
(B) Elastic potential energy
(C) Absolute potential energy
(D) None of the above
By work energy principle work done by the body is equals to change in its?
(A) Potential energy
(B) Kinetic energy
(C) Both of above
(D) None of the above