Juanita sticks a nail to the end of a bar magnet. She then sticks a second nail to the first, then another to that one, and so on. When she gets to the seventh nail, it falls off the sixth nail.Which statement best describes the forces acting on the seventh nail?
Answer
A
The force of magnetism is equal to the force of gravity.
B
The force of gravity is stronger than the force of magnetism.
C
The force of magnetism is stronger than the force of gravity.
Explanation
The seventh nail falls because the magnetic pull from the sixth nail is not strong enough to hold it up. Gravity pulls downward more strongly than magnetism pulls upward, so the correct statement is that the force of gravity is stronger than the force of magnetism.
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