Question

Two objects of masses 2m and m are moving with velocities v and 2v, respectively. Find the ratio of their kinetic energies​

Answer 1

Explanation:

Let the kinetic energies of two objects be k1 and k2

k1 = 1/2 m1v1^2= 1/2 × 2m × v^2 = mv^2

k2 = 1/2 m2 v2^2 = 1/2 × m × 4v^2 = 2mv^2

k1 / k2 = 1/2

Hence ratio is 1/2.

Answer 2

Answer: the answer is given in the attached picture and i did not write the steps

Explanation: