Noncontact Forces

As the distance between two magnets increases (they get farther apart), the force between them: (a)  

• Increases
• Decreases
• Stays the Same

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

What kind of magnet can be turned on and off?

• refrigerator magnet

• electromagnet
• magnetite
• iron

LIKE poles on magnets

• Attract

• Repel

UNLIKE poles on magnets

• Attract

• Repel

Tags

NGSS.3-PS2-4

In order for electricity to flow, the circuit must be

• open

• closed

Where does a magnet have the strongest magnetic field?

• at the poles

• in the middle

• only at the north pole

• only at the south pole

Tags

NGSS.MS-PS2-3

You have an unlabeled horseshoe magnet, so you do not know which end is north or south. Which investigation would give you the answer?

• Putting a piece of iron next to the mystery side. If it is repelled, the mystery side of your magnet is north.

• Putting a piece of iron next to the mystery side. If it is attracted, the mystery side of your magnet is north.

• Putting the north side of another magnet near one of the poles of another magnet. If the north side attracts the mystery side, it is north.

• Putting the north side of another magnet near one of the poles of the mystery magnet. If the north side repels the mystery side, it is also north.

Your friend places a magnet on the table and states that magnets have only attractive forces. You disagree, saying that magnets have attractive and repulsive forces. To show your friend, you place another magnet on the table, as shown below. Nothing happens. What should you do to convince your friend of your claim?

• Nothing, your friend is right.

• Turn the second magnet around.

• Move the magnets closer together.

• Turn the second magnet around and move them closer together.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

If pushed closer to each other, what will happen to these magnets?

• Nothing will happen.

• They will attract and 'stick' together

• They will repel and push away from each other.

• They will spin in circles.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Which of the following describes gravitational force?

• contact & repulsive

• contact & attractive

• noncontact & attractive

• noncontact & repulsive

Tags

NGSS.MS-PS2-4