Question

Calculate the speed of a body of a mass 200 g having kinetic energy of 10 j.

Answer 1

.......velocity is 10m/s

Answer 2

Speed of a body is 10 m/s

Step-by-step explanation:

Given,

Mass of body, m = 200 gm = 0.2 kg

Kinetic energy, KE = 10 j

As per the formula of kinetic energy,

$KE = \frac{1}{2} \times m\times v^2$

put these above value,

$10 = \frac{1}{2} \times 0.2 \times v^2$

$10 = 0.5 \times 0.2 \times v^2$

$v^2 = \frac{10}{0.5\times 0.2}$

$v^2 = \frac{10}{0.1}$

$v^2 = 100$

v = 10 m/s

Speed of a body is 10 m/s