Kinetic Energy (Cambridge O Level Physics)

• Energy in an object's kinetic store is defined as:

The amount of energy an object has as a result of its mass and speed

• This means that any object in motion has energy in its kinetic energy store

Object in Motion

This car has mass and is not stationary, so there is energy in its kinetic store

• Kinetic energy can be calculated using the equation:

$E_k = \frac{1}{2} \times m \times v^2$

• Where:
  • E_K = kinetic energy in joules (J)
  • m = mass of the object in kilograms (kg)
  • v = speed of the object in metres per second (m/s)