Abdul moves a magnetic toy train away from a magnet that cannot move. What happens to the potential energy in the system of magnets during the movement?
a The potential energy decreases because the train moves in the same direction as the magnetic force.
b The potential energy decreases because the train moves against the magnetic force.
c The potential energy increases because the train moves against the magnetic force.
d The potential energy does not change because the magnets in the system do not change.
Abdul moves a magnetic toy train away from a magnet that cannot move. What happens to the potential energy in the system of magnets during the movement?
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The correct answer is b: The potential energy decreases because the train moves against the magnetic force.
Explanation: When Abdul moves the magnetic toy train away from the magnet, he is doing work against the attractive force of the magnet (the magnetic force). As the train moves farther away, the magnetic force is exerted less strongly, which causes a decrease in the potential energy of the system. Hence, the potential energy decreases as he moves the train against the magnetic force.
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