Aims: By the end of this lesson you will have been given the opportunity to achieve a;

Level 3 by identifying some different types of force and say what they can do to an object

Level 4 explain how forces can affect motion

Level 5 compare the different size of forces to suggest what happens when they are unbalanced

What forces are there?

Make a list in your books

What can these forces do to objects?

Aims: By the end of this lesson you will have been given the opportunity to achieve a;

Level 3 by identifying some different types of force and say what they can do to an object

Level 4 explain how forces can affect motion

Level 5 compare the different size of forces to suggest what happens when they are unbalanced

I want you to investigate one type of force today FRICTIONWhich surface would be best for slipping on?

1. Use the Newton metre to drag the shoe2. Read how much force (Newton's) is needed to move the shoe3. Repeat on different surfaces

Surface Force needed to drag shoe (N)

Idea for a results table...

Conclusion

I found out that ....................................... because.....................

Level 3State what you found out

Level 4Say why

Aims: By the end of this lesson you will have been given the opportunity to achieve a;

Level 3 by identifying some different types of force and say what they can do to an object

Level 4 explain how forces can affect motion

Level 5 compare the different size of forces to suggest what happens when they are unbalanced

Balanced and Unbalanced Forces

Why?

RESULTANT FORCESWhen 2 or more forces act on an object they can be replaced by a single force called the RESULTANT FORCE

6N

6N

12N

RESULTANT FORCES

4N4N

0N

RESULTANT FORCES

29N16N

1N

12N

BALANCED FORCES

3N3N

OBJECT AT REST (STATIONARY)

RESULTANT FORCE = 3N – 3N = 0N

OBJECT REMAINS AT REST (STATIONARY)

BALANCED FORCES

3N3N

MOVING OBJECT

RESULTANT FORCE = 3N – 3N = 0N

OBJECT TRAVELS AT CONSTANT SPEED

UNBALANCED FORCES

6N3N

MOVING OBJECT

RESULTANT FORCE = 6N – 3N = 3N

OBJECT INCREASES SPEED FROM SPEED ORIGINALLY MOVING AT

UNBALANCED FORCES

3N6N

MOVING OBJECT

RESULTANT FORCE = 6N – 3N = 3N

OBJECT SLOWS DOWN FROM SPEED ORIGINALLY MOVING AT (DECELERATES)

Balanced and Unbalanced Forces

1) When the forces are _________ an object is either ________ or moving with _____ _____.

2) When the force is greater forward. The object is getting _________.

3) When the force is greater backward. The object is getting _______.

Check you answers1) When the forces are _balanced__ an object is either _stationary__ or moving with _steady speed.

2) When the force is greater forward. The object is moving _forward_.

3) When the force is greater backward. The object is moving _backwards_.

Aims: By the end of this lesson you will have been given the opportunity to achieve a;

Level 3 by identifying some different types of force and say what they can do to an object

Level 4 explain how forces can affect motion

Level 5 compare the different size of forces to suggest what happens when they are unbalanced