# What is Kinetic energy

**kinetic energy**

This is the energy of motion.

There are many forms of kinetic energy – vibrational (the energy due to vibrational motion), rotational (the energy due to rotational motion), and translational (the energy due to motion from one location to another).

Kinetic energy expresses the fact that a moving object can do work on anything it hits. The total mechanical energy of an object is the sum of its kinetic energy and potential energy.

If the object is moving the kinetic energy equals one half times the mass (m) of the object times (t) the square of the speed (v) of the object:

**E=1/2*m*v ^{2},**

where:

**m** – the mass of the object is measured in kg. If the mass is in gramms for example you have to calculate it in kg to use it properly in the formula.

**v** – velocity of the object is measured in m/s (meters per second)

The answer should always be stated in joules (J), which is the standard unit of measurement for kinetic energy.

**1 J is equivalent to 1 kg * m ^{2}/s^{2}.**

The velocity of the object (if you do not know it) can be calculated if we know the distance and time of traveling of the object using the equations:

v = d / t,

where,

d – distance, measured in meters (m)

t – time, measured in seconds (s)

**kinetic energy concept**

##### Kinetic energy – examples:

**Kinetic energy of moving truck**

*Speed and stopping distance (see more at shofior.com).*

**Kinetic energy of sledding**