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