1. But why did they sink in the first place?

2. FORCES
When you ride a bike, your foot PUSHES against the pedal. The push makes the wheels of the bike move.
When you drop something, it is PULLED to the ground by gravity.

3. FORCES A FORCE is a PUSH or PULL in a particular DIRECTION.
Sometimes, a force is also a twist!

4. FORCES FORCES AFFECT HOW OBJECTS MOVE.
Forces can affect motion in the following ways: They can make objects:
START MOVING
MOVE FASTER
MOVE SLOWER
STOP MOVING
CHANGE DIRECTION
CHANGE SHAPE
BIG SCIENCE IDEA

5. Force Practice
Each group has 5 min to demonstrate how the hot wheels car involves all 5/6 different effects of forces we have just listed.

6. Now try the examples on your worksheet
FORCES
Since forces cause changes in SPEED or DIRECTION of an object, we can say that….
Forces cause ACCELERATION.
Now try the examples on your worksheet

7. There are lots of different types of forces
Thrust
This can be any driving force, it may be a push or pull, but it could be an engine which forces an object forward.
Lift
This is the force required to raise an object through a fluid
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.

8. Friction Gravity Upthrust
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.
Gravity
This force affects every object on Earth. It is a force which pulls everything to the centre of the earth.
Upthrust
This is an upward force which acts in water, it acts on a object against gravity, and is why certain objects float.
Other forces can’t be seen but form fields. Examples of this would be magnetic fields and electromagnetic fields.

9. Can you come up with an example of each one of these forces we have just defined?
Write the answer into the table on your sheet

10. 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?

11. 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
This force is only present where the car is in contact with the floor, it acts against the propulsion.
Thrust
This is the most powerful force, this should be your largest arrow, it should be pointing in the direction the car is going …
The normal force is the support force exerted upon an object that is in contact with another stable object
Normal

12. Let’s summarize!
Try the problems at the bottom of your worksheet INDIVIDUALLY!