00:02
So this problem asks us about work, and it wants to know if it's possible for things like magnets in the earth to do work.
00:09
So first we can start with magnets.
00:11
Now we know that opposite poles attract and similar poles will repel when it comes to magnets.
00:18
So we'll see here in this first example, the magnets are going to move towards each other.
00:22
So this one on the left and this one on the right are going to meet up in the middle since they have opposite poles.
00:28
And so because they're applying a magnetic force that moves the magnets that fits our description of work.
00:35
So this will count as work.
00:37
Similarly, for when we have rappelling magnets here, both of them are north pole facing each other.
00:44
So they're actually going to repel and move in the opposite direction.
00:48
But again, there's a magnetic force here working because the magnetic force is being applied and it's going to move these magnets over a certain distance...