Question

If the kinetic energy of a body of mass $0.1kg$ is $20J$, then find the velocity of that body.

Answer 1

Step 1: Given data:

$$\begin{gathered} mass=0.1kg \\ Kineticenergy=20J \end{gathered}$$

Step 2: Finding the velocity of the body,

The kinetic energy in terms of mass and velocity is,

$$\begin{gathered} K.E=\frac{1}{2}m{v}^2 \\ 20=\frac{1}{2}\times 0.1\times v^2 \\ 400=v^2 \\ v=20m/s \end{gathered}$$

Hence, the velocity of the body is $20m/s$.