Question

two objects whose masses are in the ratio of 2:3 are moving with speed in the ratio of 4:5 .calculate the ratio of their kinetic energies

Answer 1

kinetic energy = 1/2mv² so K.E in 1st case =1/2×2×4²= 16 KE in case2=1/2×3×5²=75/2 KE case1/KE case2=16/75/2=32/75