Question

If the speed of a particle is increased by two times, how will its kinetic energy be affected? Show by calculation.

Answer 1

Answer:

K.E' = 4 K.E

K.E increased to 4 times.

Explanation:

              K.E = 1/2 mv² .......( 1 )

                v' = 2v         putting in Eq.1

              K.E' = 1/2 m (2v)²

              K.E' = 1/2 m (4v²)

              K.E' = 4 (1/2 mv²)

              K.E' = 4 K.E