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### Course: Physics archive>Unit 10

Lesson 1: Discovery of magnetism

# Compass build (stroke direction)

Does the direction which we stroke the needle determine the final orientation? Created by Brit Cruise.

## Want to join the conversation?

• How do you figure out which side of the magnet is facing North?
• Great question! I think you'll be able to figure it out if you watch this video http://www.khanacademy.org/science/projects/discoveries/magnetism/v/floating-magnet--poles. Brit illustrates how the magnet is labeled! It's a good video as well. I'd answer the question, but I think you'd appreciate being able to see Brit explain how you can do an experiment to see why! Awesome question though.
• Well, if the needle points north, then it is the north pole of the magnet(because the geographical north of the earth is the magnetic south). Does that mean the direction we stroke towards becomes the same pole as the pole of the magnet it is stroked with?
• The direction the needle is stroked is the direction it will point. but if you stroke it with the south side the needle will point north because opposite forces attract. Does this help?
• How do you find out which side of the magnet is facing North?
• What if you stroke half the needle to face north and the other half to face south? would it keep spinning or lock into place?
• I have been hearing that the direction in which you stroke matters. Is this true?
(1 vote)
• At what is being stuck onto the needle?
At what is being rubbed on the needle? A magnet?
• why do magnets like south and north stick together?