Question

Give two examples of kinetic energy.

Answer 1

1. Kinetic energy is the energy possessed by a body on account of its motion is called kinetic energy.
2. The kinetic energy of the body depends upon the mass $\left(m\right)$ and the square of the speed $\left(v^2\right)$ of the body.
3. $$\begin{gathered} KIneticenergy=\frac{1}{2}mass\times {\left(velocity\right)}^2 \\ K=\frac{1}{2}m{v}^2 \end{gathered}$$
4. The SI unit of kinetic energy is $Joule\left(J\right).$
5. Examples: When an electron is moving.

1. A falling asteroid on earth.
2. A freely falling stone.
3. Every musical instrument possesses vibrational kinetic energy.