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

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.

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