Question

The kinetic energy acquires by a mass m in travelling distance d, starting from rest, under the action of a constant force is directly proportional to ___________

(a) m

(b) m^0

(c) √m

(d) 1/√m

I have been asked this question during an online interview.

My doubt is from Moment of Inertia in portion System of Particles and Rotational Motion of Engineering Physics I

Answer 1

Correct option is (b) m^0

The explanation: v^2-u^2=2as

v^2-0=2×F/m×d = 2Fd/m

Kinetic energy = 1/2 mv^2=1/2 m×2Fd/m = Fd

Hence, kinetic energy does not depend on m or it is directly proportional to m^0.