Forces and Fields Revision

What is a force?

• A type of energy
• A push or pull on an object
• A type of matter
• A type of light

Normal force is the force that pulls you down towards the ground

• True

• False

What will happen if two bar magnets are put together like this?

• do nothing
• break
• repel
• attract

The slowly churning liquid iron core of the Earth helps to explain why the Earth...

• Has an electrical field

• Has gravity

• Has a magnetic field

• Rotates on its axis

A balanced force is when

Imagine you have a bar magnet. Where would you find the strength of the magnetic field to be the strongest?

• In the middle of the magnet

• At the poles of the magnet

Look closely at the magnetic field lines. Will these magnets attract or repel?

• Attract
• Repel

Which of these objects would a magnet attract?

• 
• 
• 
• 

If forces on an abject are balanced what could happen to the motion of the object?

• speed up

• slow down

• not move

• continue moving at a constant velocity

What is the net force?

• 5000 N right
• 4000 N right
• 40 N left
• 4000 N left