Question

find the velocity of the body mass 2kg having Kinect energy 100kilo joules​

Answer 1

Mass of the body = 2 kg

Kinetic Energy = 100 kJ = 100 * 10³ J

Velocity of the body = ?

The relation between Kinetic Energy and velocity is given as:

$K.E = \dfrac{1}{2} \times m \times v^2\\\\100 \times 10^3= \dfrac{1}{2} \times 2 \times v^2\\\\v^2 = 100 \times 10^3\\\\v = \sqrt{10^2 \times 10^2}\\\\v = 100 \ m \ s^{-1}$

Hence, Velocity of the body is 100 m/s.