# What are contact forces?

In this lesson, we will learn about contact forces. We will discuss air and water resistance and examine what balance and unbalanced forces are. We will also investigate friction. Based on our investigation we will make conclusions about the causes and characteristics of friction.

Quiz:

# Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Q1.Where did Isaac Newton live?

1/4

Q2.What do we use to measure mass?

2/4

Q3.What do we use to measure weight?

3/4

Q4.What is the hook at the top of a Newton meter used for?

4/4

Quiz:

# Intro quiz - Recap from previous lesson

Before we start this lesson, let’s see what you can remember from this topic. Here’s a quick quiz!

Q1.Where did Isaac Newton live?

1/4

Q2.What do we use to measure mass?

2/4

Q3.What do we use to measure weight?

3/4

Q4.What is the hook at the top of a Newton meter used for?

4/4

# Video

Click on the play button to start the video. If your teacher asks you to pause the video and look at the worksheet you should:

• Click "Close Video"
• Click "Next" to view the activity

Your video will re-appear on the next page, and will stay paused in the right place.

# Worksheet

These slides will take you through some tasks for the lesson. If you need to re-play the video, click the ‘Resume Video’ icon. If you are asked to add answers to the slides, first download or print out the worksheet. Once you have finished all the tasks, click ‘Next’ below.

Quiz:

# What are contact forces?

Don’t worry if you get a question wrong! Forgetting is an important step in learning. We will recap next lesson.

Q1.Contact forces will only take place if...

1/4

Q2.If the forces pushing and pulling an object are the same strength then they are...

2/4

Q3.Friction causes...

3/4

Q4.If a material is very rough, the "bumps" on the surface are...

4/4

Quiz:

# What are contact forces?

Don’t worry if you get a question wrong! Forgetting is an important step in learning. We will recap next lesson.

Q1.Contact forces will only take place if...

1/4

Q2.If the forces pushing and pulling an object are the same strength then they are...

2/4

Q3.Friction causes...

3/4

Q4.If a material is very rough, the "bumps" on the surface are...

4/4

# Lesson summary: What are contact forces?

## Time to move!

Did you know that exercise helps your concentration and ability to learn?

For 5 mins...

Move around:
Climb stairs

On the spot:
Dance