Question

1. Two bodies A and B of equal mass have their velocities in the ratio 1 : 2. What will be the ratio
of their kinetic energies?
a. 2:1
b. 1:2
c. 1:4
d. 4:1​

Answer 1

Answer:

1:4

Explanation:

Given velocity of first body  v1=v 

And velocity of second body, v2=2v 

Since masses are same, kinetic energy is directly proportional to the square of the velocity (Kav2) 

Hence. ratio of their kinetic energies is:

k2k1=v22v12=(2v)2v2=2v2v2=41=1:4

Hope it helps..!!