Obtain a permanent magnet and an object that is attracted to the magnet but not repelled. Imagine that you do not know which object is the magnet. Using only these two objects, find a way to determine which object is the permanent magnet. Describe it below (Hint: Are there parts on either object that do not interact as strongly as other parts. This may be harder with refrigerator magnets which may have multiple north and south poles.)

the ends of the permanent magnet have a much greater magnetic force than its central parts,

Explanation:

In this exercise we can assume that we have two small bars, one of them magnetic and the other not (iron).

 If we approach one of the bars by its two ends to the end of the other we see that it attracts it and if we approach it through its center the attraction is very small.

Now let's change the bar, we bring it closer to the other by its ends and its center to the end of the other and we see that the attraction is the same in all cases.

After these two experiments we can say that the first bar is the permanent magnet.

In conclude the ends of the permanent magnet have a much greater magnetic force than its central parts, this can be applied to any shape of the magnet

the answer to this question is 60 n

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