All About Forces
True or false:
A force is only a push.
FALSE: A force is a push and a pull.
Magnets attract to...
Iron and other magnets
True or False: Gravity is a push and a pull.
No, gravity is only a pull.
In tug of war what forces occurred?
pushes and pulls (direct/contact forces)
If you slide a book across a table, you are using this type of force.
Push (direct/contact)
What force is both a push and pull?
Magnetism/Magnetic Force
True or False:
Magnets have a north, south, east and west pole.
If I take a tenis ball and throw it right, left, or up what will happen to it? Why will this happen?
It will go downward because he force of gravity will pull it back down to Earth.
If you put a magnet near a penny, what will happen?
Nothing. The copper in the penny is not magnetic.
Name 2 forces that act (occur) on an object even when they are NOT touching each other.
Gravity and Magnetism
When a magnet pulls a paperclip toward it without touching it, it is using this special force.
Magnetic force
The ________ gravity pulls on the Earth's oceans and causes tides.
The moon's gravity
Joseph kicks a ball two times. On the second kick, he uses twice as much force as the first kick. Which is more likely to happen?
a. The ball will not move.
b. The ball will go twice as far.
c. The ball will go the same distance as the first kick.
b. The ball will go twice as far.
1. ALL OF THE TIME
2. SOME OF THE TIME
3. NEVER
1. ALL OF THE TIME
How is magnetic force THE SAME as the force of gravity?
They both attract (pull).
Indirect/Noncontact
Would you weigh MORE or LESS on the moon?
less
Jordan had two magnet bars on the table. She slowly began to push one of them toward the other on the side that was labeled with a "N." The magnets began to push apart. Why?
They were both north poles, so they repelled each other.
What is the invisible area where a magnet can attract another magnet?
Magnetic field
If you pull a wagon north and then push it south, you have changed _________ because the wagon is now moving the opposite way.
You have changed its direction.
Alan moves one magnet closer to another magnet. Describe TWO different things that could happen as he moves them closer.
It will repel (push) or it will attract (pull) the other magnet, but it depends on which side of the magnet he is using.
North and north or south and south REPEL (push)
North and south ATTRACT (pull)
How is gravity DIFFERENT from magnetic force?
If you drop a rock and a feather from the same height, which one will gravity pull back faster?
Gravity is ONLY a pull.
When objects collide, they ____________.
a. push against each other
b. pull away from each other
c. have no effect on each other
a. Push against each other
Forces like pushes and pulls can make an object start, stop, or change this.
motion (movement)