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What are forces?
It is something that can make an object start moving, stop moving, change shape or break.
When do we apply force to an object?
Whenever we push or pull it.
Do all objects change shape permanently?
No, only some objects change shape permanently.
Name an object that changes shape temporarily.
A sponge.
What do we call the objects that break when we apply force to them.
Rigid Objects
What is Friction?
It is the force that causes a moving object to stop moving.
When does Friction occur?
It occurs when two objects rub againts each other.
Name everyday activities where we use Friction.
When we are walking, running, jogging, driving a car, riding a bicycle, etc...
Does an object move by itself?
No, a force needs to act on it for it to move.
Which has more friction, rough or smooth surfaces?
Rough surfaces
What do magnets have?
They have magnetic force.
What do you call the two ends of the magnet? Name them.
They are called poles; the north pole and the south pole.
In what direction does a magnetic field flows?
It flows from the north pole to the south pole.
What happens when we put the same poles of two magnets together?
They repel each other.
What happens when we put the opposite poles of two magnets together?
They attract each other.
What do you call the force that pulls every thing back to Earth?
We call it Gravity.
