The paper clip in Figure 10 is not a permanent magnet. Explain what would happen if the paper clip was removed and brought close to the
south pole of the permanent magnet.
[2 marks]
Figure 5 shows the inside of a plug.

The drag force, fd, imposed by the surrounding air on a vehicle moving with velocity v is given by fd = cdaρv 2/2 where cd is a constant called the drag coefficient, a is the projected frontal area of the vehicle, and ρ is the air density. an automobile is moving at v = 80 kilometers per hour with cd = 0.28, a = 2.3 m2, and ρ = 1.2 kg/m3.