Question

Calculate the kinetic energy of a body of mass 2 kg moving with a velocity of 0.1 metre per second. . 

Answer 1

Solution. The formula for calculating kinetic energy is

Kinetic energy $=\frac{1}{2} m v^{2}$

Here, Mass, $m=2 \mathrm{~kg}$

And, Velocity, $v=0.1 \mathrm{~m} / \mathrm{s}$

So, putting these values in the above formula, we get:

Kinetic energy $=\frac{1}{2} \times 2 \times(0.1)^{2}$

$$

=\frac{1}{2} \times 2 \times 0.1 \times 0.1

$$

Thus, the kinetic energy of the body is $0.01$ joule.