(a)[1]
State which pole of the bar magnet points toward the geographic north of the Earth.
(b(i))[2]
Describe a way of supporting the magnet in air so that it can rotate horizontally. A diagram may be included in your answer.
(b(ii))[1]
One student suggests floating the magnet on water. Describe how the magnet can be supported on water so that it can rotate freely. A diagram may be included in your answer.
(c)[1]
State and explain which of the methods in (b) lets the magnet stop rotating in the shortest time.