# 1.1.2 Examples of Energy Transfer

### Examples of Energy Transfer

• Energy transfers occur all the time in various everyday circumstances
• Some common situations include
• When an object is projected upwards
• When a moving object hits an obstacle
• When an object is accelerated by a constant force
• When a vehicle speeds up or slows down
• When water is brought to a boil in an electric kettle

#### An Object Projected Upwards

• Before the ball is thrown upwards, the person holding the ball is a store of chemical energy
• When the ball is thrown, the chemical energy is converted into kinetic energy as the ball begins to move upwards
• As the height of the ball increases, the kinetic energy is converted into gravitational potential energy

#### A Moving Object Hitting an Obstacle

• When an object, such as a car, is moving, chemical energy from the fuel is converted into kinetic energy
• If the object hits an obstacle, such as a car hitting a wall, the speed of the car will decrease very quickly
• Therefore, the kinetic energy of the car will decrease
• In this scenario, most of the kinetic energy is converted to heat and sound between the car and the wall

#### A Vehicle Being Accelerated by a Constant Force

• When a vehicle is stationary, it stores chemical energy in the fuel
• When the vehicle speeds up, or accelerates, the chemical energy is converted into kinetic energy

#### A Vehicle Slowing Down

• When a vehicle is moving, it has kinetic energy
• As it slows down, or decelerates, the kinetic energy is converted to heat and sound between the tyres and the road

#### Boiling Water in a Kettle

• When an electric kettle is used to heat up water it uses electricity to increase the temperature of the heating element
• During this process, electrical energy is converted into heat energy

### Author: Ashika

Ashika graduated with a first-class Physics degree from Manchester University and, having worked as a software engineer, focused on Physics education, creating engaging content to help students across all levels. Now an experienced GCSE and A Level Physics and Maths tutor, Ashika helps to grow and improve our Physics resources.
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