### Forces: an introduction

An introduction to the forces topic looking at contact and non-contact forces, and comparing scalars and vectors.

Skip navigation# Unit Overview: Forces

## Lessons:

### Forces: an introduction

### Weight, mass and gravity

### Resolving forces (HT)

### Forces and work

### Forces and elasticity (Part 1)

### Forces and elasticity (Part 2)

### Moments and levers

### Moments and gears

### Pressure

### Pressure in fluids

### Atmospheric pressure

### Speed

### Distance: Time graphs

### Acceleration

### Velocity: Time Graphs

### Terminal velocity

### Newton's Laws

### Acceleration Required Practical (Part 1)

### Acceleration Required Practical (Part 2)

### Stopping distance

### Momentum

### Collisions and car safety

### Combined science review

### Physics only review

### Case Study: Sir Isaac Newton

National Curriculum

For next step we recommend the unit: Forces and motion.

25 lessons

An introduction to the forces topic looking at contact and non-contact forces, and comparing scalars and vectors.

In this lesson we look at the difference between weight and mass, and how to calculate weight using gravitational field strength and mass. We also explore the use of unit conversions, and equation rearranging.

In this lesson we will look at calculating resultant force, where vectors occur in similar and different directions. We will look at how resultant forces affect the motion of an object. We will also look at HT-only content in resolving a single force into its two components.

In this lesson we define work done, introduce the equation for work done and use it to calculate force and distance.

In this lesson we look at elastic objects, and the relationship between force and extension. We also go through the method for one of your required practicals.

In this lesson we carry on looking at elastic objects, and the relationship between force and extension. We also go through the results of our required practical.

In this lesson we look at moments and levers, and how the rotational effect of a force helps us in many everyday situations.

In this lesson we look further at moments and also gears. We look at how the rotational effect of a force helps us in many everyday situations.

In this lesson we look at pressure. By the end of the lesson you should be able to say what pressure is, how to calculate it, and how we can use this knowledge in everyday situations.

In this lesson, we concentrate on pressure in fluids, and in particular how pressure changes in liquids. By the end of the lesson you will be able to calculate pressure in a column of water, and also explain why objects sink or float.

In this lesson we look at atmospheric pressure, and how it changes as we change altitude.

In this lesson we will learn the definition and equation of speed.

In this lesson we will learn about distance-time graphs, and how to calculate speed using the gradient of a graph.

In this lesson we will look at the definition and equation of acceleration. We will also learn how to calculate acceleration.

In this lesson we will look at the relationship between velocity and acceleration, and calculating acceleration from a velocity-time graph.

In this lesson we will look at the definition and conditions needed for terminal velocity. We will look at terminal velocity in different contexts.

In this lesson we will learn Newton's laws of motion. We will learn how to calculate the resultant force of different objects. We will also look at the relationship between resultant force, mass and acceleration.

In this lesson we will look at the required practical of investigating the effect of varying the mass on the acceleration of an object of constant force.

In this lesson we will look at the required practical of investigating the effect of varying the force on the acceleration of an object of constant mass.

In this lesson, we will learn about stopping distance. We will look into thinking distance, braking distance and how these are linked to stopping distance.

In this lesson we will learn about the definition of momentum and how to calculate momentum of different objects. We will also look into the principle of conservation of momentum.

In this lesson we will look at car safety and the factors that can affect car safety.

This lesson revises the Forces subject knowledge common to the GCSE Combined Science and Physics, and gives an opportunity to work through some independent tasks and exam questions.

This lesson revises the Forces subject knowledge of the GCSE Physics Science only, and gives an opportunity to work through some independent tasks and exam questions.

In this lesson we explore the life of Sir Isaac Newton, and look at some of his key findings.