Introduction to forces

Learn about the different types of forces and the difference between contact and non-contact forces

Force diagrams and resultant forces

Learn about drawing and interpreting force diagrams. Find out how to calculate resultant forces acting on an object.

Motion and speed

Find out more about the difference between motion and speed and how to use the speed equation.

Representing journeys

Find out how to use distance-time graphs to describe a journey and to calculate speed.

Weight and mass

Find out about the difference between weight and mass, how to explain why weight changes on different planets and how to apply the weight equation.


Learn how to identify different types of resistive forces and how to investigate the effect of friction.

Terminal velocity

Learn about the forces acting on an object in free fall and to describe how the motion of an object changes during free fall.

Energy stores and energy transfers

Learn about common energy stores and energy transfers and how to apply the work equation.


Learn about moments and pivots, apply the moment equation and identify common levers and applications of moments.

Hooke's law

Learn about Hooke's Law and about the spring constant of a spring as being the amount of force needed to extend a spring. Explore how to find the spring constant of a spring.

What is pressure?

Find out what pressure is.

What is gravity?

Learn about gravity.

How to explain forces

Learn how forces work.

How to show the difference between force and pressure

Learn how to show the difference between force and pressure.

What is water pressure?

Learn about water pressure.

How to weigh a floating object without scales

Learn how to find the weight of a floating object.

How to show pressure exists in liquids

Find out how to show pressure exists in liquids with this step-by-step demonstration.

3 Classroom videos

We have a selection of great videos for use in the classroom