Question

4. Find the mass of a body which has 5 of kinetic energy while moving a speed
2m/s (AS) (Ans: 2.5 kg)
​

Answer 1

Answer:

Correct option is

B

2.5kg

Given, kinetic energy of the body, Ek=5J;

speed of the body, v=2m/s

If m is the mass of the body, then, Ek=21mv2

or m=v22Ek=(2)22×5=2.5kg