Question

Calculate the velocity of a body of mass 4 kg possessing KE of 0.02 J.

Answer 1

Given,
Mass of a body (m) $=$ 4kg
Velocity of the body (v) $=$?
Kinetic energy (K.E) $=$ 0.02 J
K.E. $=\frac{1}{2}m{v}^2$
$\frac{1}{2}\times 2\times v^2=0.02joule$
$v=\sqrt{0.02};v=0.141m{s}^{-1}$