# How can we measure the size of forces?

In this lesson, we will learn how we can measure the size of forces, particularly how we can measure weight. We will learn about Isaac Newton and his contribution to our knowledge of forces as well as Newtons as a unit of measurement. We will also investigate how to use a Newton meter to measure forces.

# How can we measure the size of forces?

In this lesson, we will learn how we can measure the size of forces, particularly how we can measure weight. We will learn about Isaac Newton and his contribution to our knowledge of forces as well as Newtons as a unit of measurement. We will also investigate how to use a Newton meter to measure forces.

## Lesson details

### Key learning points

1. Describe what Newton discovered about forces
2. Explain what a Newtonmeter is and what it does
3. Explain how to measure the size of a range of forces

### 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.
Which of these is NOT an example of a non-contact force?
Gravitational force.
Magnetic force.
Q2.
What is the correct definition of water resistance?
A force that pushes upwards on objects that are in water.
Correct answer: A type of friction between water and a material.
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.

## Exit quiz

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### 4 Questions

Q1.
Where did Isaac Newton live?
Belgium
France
United States
Q2.
What do we use to measure mass?
kilometres
liters
Newtons
Q3.
What do we use to measure weight?
grams
kilometres
liters