How is the kinetic energy of a moving cart affected if its velocity is reduced to 13rd of the initial velocity?
Kinetic energy reduces to 19th its initial value
As we know kinetic energy K=12mv2. Now, if the velocity v is reduced to 13rd of the initial velocity(keeping the mass same), the kinetic energy reduces to 19th its initial value(since kinetic energy is directly proportional to the square of velocity).