Embedded Files
Key Vocabulary
Key Vocabulary
Vocabulary
Vocabulary
Definition
Definition
Streamlined
Streamlined
A shape that presents least resistance to air or water.
A shape that presents least resistance to air or water.
Grip
Grip
To have a good connection with a surface.
To have a good connection with a surface.
Surface
Surface
The top layer of something.
The top layer of something.
Drag
Drag
To cause an object to slow down.
To cause an object to slow down.
Centre
Centre
The middle of an object.
The middle of an object.
What is a Force?
What is a Force?
A force is either a push or a pull.
A force is either a push or a pull.
Forces can make things:
Forces can make things:
- Speed up
- Slow down
- Change shape
- Change direction
A force that speeds something up
A force that speeds something up
The boy is pushing the trolley to speed it up.
The boy is pushing the trolley to speed it up.
A force that slows something down
A force that slows something down
The donkey is pulling the rope to slow the man down.
The donkey is pulling the rope to slow the man down.
A force that changes the shape of something
A force that changes the shape of something
The ball is being squeezed so it is changing shape.
The ball is being squeezed so it is changing shape.
A force that changes the direction of something.
A force that changes the direction of something.
When Serena Williams hits the ball, it changes direction.
When Serena Williams hits the ball, it changes direction.
Types of Force
Types of Force
Type of Force
Type of Force
Description
Description
Magnetism
Magnetism
Attract:
Attract:
Repel:
Repel:
Magnets attract or repel each other or other objects
Magnets attract or repel each other or other objects
North and South attract.
North and South attract.
But North and North or South and South will repel.
But North and North or South and South will repel.
Friction
Friction
- Friction happens when two surfaces touch each other. Friction gives us grip.
- Friction produces heat.
- Rougher surfaces slow things down a lot.
- Smoother surfaces don’t slow things down as much.
Air Resistance
Air Resistance
- Air resistance slows down moving objects, because air slows you down as you move through it
- To travel faster through the air, things need to be streamlined.
Water Resistance
Water Resistance
- Water resistance slows down moving objects, because water slows you down as you move through it
- To travel faster through the water, things need to be streamlined.
Gravity
Gravity
- Gravity is the forces that pulls objects down towards the centre of the Earth.
- Gravity stops things from floating away into space.
- When things go into the air (like a football) gravity pulls them back down.
Think you know it all? Take the quiz!
Think you know it all? Take the quiz!
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