Kinetic energy

What is Kinetic energy?

In physics, the kinetic energy (KE) of an object is the energy that it has due to its motion. It is defined as the work needed for an object of a known mass to accelerate to a given velocity. This energy  the object gains during its acceleration, will be maintained unless its speed changes.

Kinetic energy equation

To calculate Kinetic energy we write the equation like this.

$E_k = { 1 \over2} mv {^2}$

Kinetic energy demo

In this tutorial you will learn how to calculate the energy stored in a moving object.

Chilled practice question

Calculate to the nearest Joule the Kinetic energy store in a car with a mass of 850 Kg which is moving at a velocity of 3.5 m/s

Frozen practice question

A meteorite has 8000 J of Kinetic energy, calculate its mass if it is moving with a velocity of 20 m/s

Science in context

Anything that is moving has energy in its kinetic energy store

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