 # Kinetic Energy Formula

Kinetic energy is the energy possessed by a body due to its motion. Kinetic Energy Formula is articulated as

$$\begin{array}{l}k.E = \frac{1}{2}mv^{2}\end{array}$$

Where,

mass of the body = m,

the velocity with which the body is travelling is v.

The Kinetic energy is articulated in Kgm2/s2

Kinetic energy formula is used to compute the mass, velocity or kinetic energy of the body if any of the two numerics are given.

## Kinetic Energy Solved Examples

Underneath are questions on Kinetic energy which aids one to understand where they can use these questions.

Problem 1: A car is travelling at a velocity of 10 m/s and it has a mass of 250 Kg. Compute its Kinetic energy?

Given: Mass of the body m = 250 Kg,
Velocity v = 10 m/s,

Kinetic energy is given by

$$\begin{array}{l}k.E = \frac{1}{2} (250 kg) (10 m/s)^{2}\end{array}$$

=12500 kgm2 s2

Problem  2: A man is transporting a trolley of mass 6 Kg and having Kinetic energy of 40 J. Compute its Velocity with which he is running?

Given: Mass, m = 6 Kg
Kinetic energy K.E = 60 J

$$\begin{array}{l}Velocity, v = \sqrt{\frac{2K.E}{m}}\end{array}$$
$$\begin{array}{l}Velocity, v = \sqrt{\frac{2\times 40 J}{6 kg}}\end{array}$$
$$\begin{array}{l}=\sqrt{13.33}\end{array}$$

=3.65m/s

The man is running with the velocity of 3.65m/s