Question

Brock brings a magnet near a metal object. A magnetic force acts on an object, pulling it upward. Which of the following best describes the magnetic force?

a force that acts at a distance
a frictional force
a contact force
a gravitational foce

Answer 1

@abb0t

Answer 2

I'm sure if you logically look at it, your can cross out frictional and gravitational force.

Answer 3

"Magnetic forces are non contact forces; they pull or push on objects without touching them. Magnets are only attracted to a few 'magnetic' metals and not all matter."

Answer 4

So your left with..?

Answer 5

ok, if you do this experiment on earth, then the fact that the object goes upward makes the last choice, gravitation force, a wrong answer ( because Earth pulls everything towards it, making everything drops).

Not the third one also because the magnet is not contacting the object. Read the first sentence again, Brock only brings it "near the metal object."

Not frictional force, friction implies that it's touching, so... by the logic of the second argument, also not true.

The one that I have not eliminated is your answer. Try to figure out why that's your right answer