# 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.

# 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.

## Lesson details

### Key learning points

1. Define non-contact forces
2. Describe the cause and effect of gravitational forces
3. Describe how a magnetic force may lead to attraction or repulsion

### Licence

This content is made available by Oak National Academy Limited and its partners and licensed under Oak’s terms & conditions (Collection 1), except where otherwise stated.

## Video

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## Worksheet

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## Starter quiz

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### 4 Questions

Q1.
Contact forces will only take place if...
There is gravity
There is no air or water resistance
Correct answer: Two or more objects are touching
Q2.
If the forces pushing and pulling an object are the same strength then they are...
Contact forces
Non-contact forces
Unbalanced
Q3.
Friction causes...
Air resistance
Upthrust
Water
Q4.
If a material is very rough, the "bumps" on the surface are...
Smaller
Softer

## Exit quiz

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### 4 Questions

Q1.
Which of these is NOT an example of a non-contact force?
Gravitational force
Magnetic force
Correct answer: Water resistance
Q2.
If a golf ball and a ping pong ball were to fall at the same time, which would hit the ground first?
The golf ball.
The ping pong ball.
There is no way of knowing.
Correct answer: They would hit the ground at the same time.
Q3.
Which of these is NOT a practical use for magnets discussed in our lesson?
Magnets are placed in stomachs of cows to catch metals.
Magnets are used for televisions, microwaves and computers.
Correct answer: Magnets are used to store data in computers.
Magnets keep our refrigerator door shut.
Q4.
What would it feel like if two different sides of a magnet are brought together?
It would feel no different than bringing together two other objects.
Correct answer: They would attract each other.
They would repel each other.