Question

The momentum of a body of mass 5kg is 500kgm/s. Find its kinetic energy?

(a) 2×10^5 J

(b) 2.5×10^4 J

(c) 2.5×10^5 J

(d) 2.5J

I have been asked this question in homework.

The query is from Collision and Friction topic in section Nature of Physical World of Engineering Physics I

Answer 1

Right answer is (b) 2.5×10^4 J

The best explanation: Kinetic energy = p^2/2m = 500^2/(2×5)

Kinetic energy = 2.5×10^4 J.