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What do we call a force where two objects must be touching for the force to act?
A direct (contact) force
A book rests on a table. The table pushes back up on the book. What is the name of this contact force?
The normal force
A rope connecting a boat to a dock is pulled tight. What is the name of the force acting along the rope?
Tension
When a ball rolls across a carpet and slows down, which direct force is acting on it?
Friction
A student pushes a trolley. What type of force is the push?
A direct (contact) force
Name TWO examples of direct (contact) forces.
Any two of: friction, tension, normal force, compression, applied push or pull
What do we call a force that can push or pull an object WITHOUT touching it?
An indirect (non-contact) force
Name the THREE indirect (non-contact) forces studied in Stage 4 science.
Gravity, magnetism, and electrostatic force
What is a 'field' in science?
The region around an object where its force can be felt by other objects
A magnet pulls a nail toward it without touching it. Is this a direct or indirect force?
Indirect (non-contact) force
What happens when two north poles of magnets are brought close together?
They repel (push apart)
What happens when a north pole and a south pole are brought close together?
They attract (pull toward each other)
State the rule for magnetic poles in one sentence.
Like poles repel; unlike poles attract
Name ONE material that is strongly attracted to a magnet.
Iron (or steel / nickel / cobalt)
Why does a compass needle point north?
Earth has a magnetic field caused by its iron core and the compass needle aligns with it
A student holds a magnet near a pile of copper coins. What will happen and why?
Nothing — copper is not a magnetic material so it is not attracted to the magnet
