Question

(b) The masses of scooter and bike are in the ratio of 2 : 3, but both are moving with the same

speed of 108 km/h. Compute the ratio of their kinetic energy.

Answer 1

let the unknown quantity be x
scooters mass 2x
bike mass 3x
velcity 108 kmph
for bike K.E.
k=1/2 mv^2
k=3x.54.108
k=17496x
for scooter K.E.
k=x.108.108
k=11664x
ratio of there K.E.
k=11664x/17496x
k=11664/17496