Question

calculate the ratio of initial and final kinetic energy of a body whose velocity change from 10km/h to 20km/h ??​

Answer 1

Explanation:

initial kinetic energy

=1/2mv square

=1/2m×10 square

=50m

final kinetic energy

=1/2 mv square

=1/2m×20 square

=200m

ratio=50m/200m=1/4