1. LO: Learn how forces can be drawn
Keywords:
Contact
Non-contact
Force diagram
Forces
Lifelines:
WRITING: W2, W5
TALKING: T2
LO: Learn how forces can be drawn
Learning challenges:
Define key forces
Draw force diagrams and explain what the arrows show
Group forces into contact and non-contact

2. Task Make a table in your books like this one.
Use the cards around the room to find the name of the force, a description of it and an example of where the action can be seen.
There are 7 in total.
Name of Force
Description of action
Example of where it is seen

3. Group Activity: What forces are acting on this car which is driving along? (label the diagram with arrows showing the direction and type of force)
For bonus points: Can you make the size of the arrows proportional to the force(s) acting on the car?

4. Group Activity: What forces are acting on this car which is driving along?
This acts against the car, as it moves forward and is acting against the propulsion.
This force is always present. It goes towards the centre of the earth, so will always be pointing from the top of the object
Thrust
This is the most powerful force, this should be your largest arrow, it should be pointing in the direction the car is going …
This force is only present where the car is in contact with the floor, it acts against the propulsion.

5. Balanced vs Unbalanced
Arrows show the relative size of a force
The bigger the arrow the bigger the force
Different sized arrows show forces that are unbalanced
The object might start to move, slow down or speed up
If the arrows are the same size, the object might be still (not moving) or starting to move
The forces affect the motion of an object

6. Let’s summarise!
Try the problems at the bottom of your worksheet INDIVIDUALLY!

7. This can be any driving force, it may be a push or pull, but it could be an engine which forces an object forward.
Thrust

8. This is the force required to raise an object through a fluid (gas or liquid)
Lift

9. Air resistance
This is a force which acts in the air, it can slow objects down when they are moving against it. Or if harnessed could be used to move an object along.

10. Friction
This force acts on objects when they are in contact with a surface, such as the ground. It can be reduced by ensuring both surfaces are smooth.

11. Gravity
This force affects every object on Earth. It is a force which pulls everything to the centre of the earth. Also known as weight.

12. Upthrust
This is an upward force which acts in water, it acts on a object against gravity, and is why certain objects float.

13. Reaction
This is an upward force which acts against the force of gravity. The ground pushes up against the object on it. Without it, objects would sink.