Magnetic Poles
How many poles do all magnets have? And what are they?
2, north and south
Which direction do magnetic field lines flow?
out of the north and into the south
Why does the Earth have more gravity than you?
it has more mass
What is the type of metal that magnets are most attracted to?
iron
What type of friction is acting between the desk and the ground right now?
Static Friction
Bonus 100: is this balanced or unbalanced?
Two opposite poles (north and south) will do what?
attract
What is the space around a magnet where the force of the magnetic field can act called?
magnetic field
What is the center of the Earth made of that makes it have magnetic properties?
iron
Bonus: what is the other metal that is in the center of the Earth?
Which has the strongest magnetic force: a magnet the size of your hand, a magnet the size of a basketball, or a magnet the size of you?
the magnet the size of you
You apply 20 N of force to push a box of weights down the hall. Mr. Seibert sees you and jumps in to help you pull the box with 25 N of force in the same direction. What is the net force being applied to the box of weights?
55 N down the hall
I put the north pole of a magnet near an unknown pole of another magnet. The two poles repel. What do I know about the unknown pole?
it is also a north pole
<--- magnet <---
Which side of the magnet is the south pole?
the right
Why does the Earth have more gravity than the moon?
it has more mass
What causes a magnet to attract or repel?
magnetic force
Which way does friction always act on an object?
in the opposite direction of the motion of the object
What would happen if I break a magnet in half? How many poles would there be?
Two new magnets would form each with their own north and south poles.
What do magnetic field lines represent?
force
What are the two ways we could make a magnet stronger on Earth?
1) make it bigger 2) decrease the distance between the magnet and the object you're trying to attract or repel
As two magnets move farther and farther away from each other, the strength of the magnet does what?
gets weaker
40 N <--- box ---> 60 N
Which way is friction moving on this box?
to the left
Where is the force of attraction strongest on a magnet?
the poles
Send one person to the board from your team to properly draw the field lines on the magnets Ms. Robinson has on the board for you.
Whoever buzzes first tries first.
No matter where you stand on Earth, you can hold this tool in your hand and it will always point north. What tool is this?
a compass
Rubbing a pair of scissors onto a magnet will create what?
a temporary magnet
Which direction is the centripetal force pointing when you play tetherball? Why
pointing to the pole (the string the ball is tied to on the pole) since centripetal forces always point to the center of the circle the object is moving in