1 00:00:00,000 --> 00:00:23,460 Push and pull forces part three. Do you remember all the push and pull forces? 2 00:00:23,460 --> 00:00:38,320 So far we've reviewed contact and non-contact forces, also balanced and unbalanced forces. 3 00:00:38,320 --> 00:00:52,200 Next, we'll review magnetism. It's the third kind of push and pull force. 4 00:00:54,200 --> 00:01:08,849 Magnets have a force called magnetism. This can be a push or a pull force. Magnetism is a 5 00:01:08,849 --> 00:01:16,870 non-contact force because a magnet moves an object without touching it. Most magnets are 6 00:01:16,870 --> 00:01:22,629 man-made. They are made from iron and steel and can be different shapes, but some magnets are 7 00:01:22,629 --> 00:01:31,489 natural. For example, the mineral magnetite is a natural magnet. But how do magnets work? Magnets 8 00:01:31,489 --> 00:01:37,409 create a magnetic field around them. We cannot see these forces, but they attract objects made 9 00:01:37,409 --> 00:01:43,730 of iron and steel. We can see the objects moving towards the magnet. In this photo, the iron 10 00:01:43,730 --> 00:01:54,709 feelings show us where the magnetic field is. All magnets have two ends, the north pole and 11 00:01:54,709 --> 00:02:02,510 the south pole. On the left, the north and south pole are opposite and therefore attract each other. 12 00:02:02,510 --> 00:02:10,909 On the right, the same poles north and north repel against each other. Thanks for listening. See you soon.