Push or Pull
What kind of force happens when you press a button?
A Push
A bridge that is supported by columns
What do magnets attract?
Objects that contain iron
What is a force?
A push or pull
Name one property of magnets.
Attracting, repelling, or working at a distance
When you tow a wagon, what kind of force is it?
A Pull
What is an arch bridge?
Bridge with a curved arch
They repel
What happens when an unbalanced force acts on an object?
It moves or changes direction
What type of bridge is best for a wide river?
Arch or pillar
When you throw a ball, what kind of force is used?
A Push
Why are pillar and arch bridges stronger?
They spread out the force better
What does 'work at a distance' mean?
Magnets attract or repel without touching
What causes a ball to stop rolling?
Friction
Give an example of a push.
When you yank a rope, what kind of forces is that?
A Pull
What do arrows on bridges represent?
The direction of support forces
The fridge contains iron or steel
What happens when more forces is applied?
It moves faster or farther
Give one example of a pull.
Pulling a wagon
It doesn't move - it is a balanced force
How can you tell where a bridge is supported?
Look for pillars or arches pushing upward
No, but they are attracted by magnets
What can a force change?
Speed or direction
If you could invent something using magnets, what would it be?
????