Question

the mass and velocity of an object in and in respectively if the mass of the object becomes half and velocity becomes four times find the k e of the body​

Answer 1

Explanation:

Kinetic energy of a body of given mass, is directly proportiional to its square of its velocity. When momentum is doubled, mass remaining constant, this means velcity is doubled. Hence, kinetic energy becomes 22=4 times i.e. say from 100 units to 400 units. and percentage increase in kinetic energy is 400−100=300% .