# What are non-contact forces?

In this lesson, we will recap the definition of non-contact forces. We will also investigate gravity and gravitational force and learn about Galileo by completing an investigation. Finally, we will learn about magnetic force, including some uses for magnets.

#### Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
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.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

#### Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
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.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

# 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.

#### Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
Quiz:

# What Are Non-Contact Forces?

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

Q1.Which of these is NOT an example of a non-contact force?

1/4

Q2.If a golf ball and a ping pong ball were to fall at the same time, which would hit the ground first?

2/4

Q3.Which of these is NOT a practical use for magnets discussed in our lesson?

3/4

Q4.What would it feel like if two different sides of a magnet are brought together?

4/4

#### Unit quizzes are being retired in August 2023

Why we're removing unit quizzes from the website >
Quiz:

# What Are Non-Contact Forces?

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

Q1.Which of these is NOT an example of a non-contact force?

1/4

Q2.If a golf ball and a ping pong ball were to fall at the same time, which would hit the ground first?

2/4

Q3.Which of these is NOT a practical use for magnets discussed in our lesson?

3/4

Q4.What would it feel like if two different sides of a magnet are brought together?

4/4

# Lesson summary: What are non-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