A light and a heavy object have the same momentum. Find out the ratio of
their kinetic energies. Which one has a larger kinetic energy?
If an electric iron of 1200 W is used for 30 minutes everyday, find electric
energy consumed in the month of April.
Is it possible that an object is in the state of accelerated motion due to external force acting on it, but no work is being done by the force. Explain it with an example.
The velocity of a body moving in a straight line is increased by applying a
constant force F, for some distance in the direction of the motion. Prove
that the increase in the kinetic energy of the body is equal to the work done
by the force on the body.
The weight of a person on a planet A is about half that on the earth. He can
jump upto 0.4 m height on the surface of the earth. How high he can jump
on the planet A?
A rocket is moving up with a velocity v. If the velocity of this rocket is suddenly
tripled, what will be the ratio of two kinetic energies?
A body is falling from a height h. After it has fallen a height h/2 , it will possess
(a) only potential energy
(b) only kinetic energy
(c) half potential and half kinetic energy
(d) more kinetic and less potential energy
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