Question

A magnet is falling towards the ground as shown in the figure below.

Which among the following should be kept on the ground right below the magnet to reduce its speed?

• A. A strong magnet with north pole upwards.
• B. A strong magnet with south pole upwards.
• C. An iron sheet.
• D. A plastic sheet.

Answer 1

The correct option is B A strong magnet with south pole upwards.

We know, to reduce the speed of a falling magnet, force needs to applied in the direction opposite to its motion. If we place a strong magnet with its south pole facing upwards, the south pole of the magnet kept on the ground will repel the south pole of the falling magnet as the like pole repel each other. Hence, its speed gets reduced. A stronger magnet with its north pole upwards will make it fall faster. A plastic sheet will not have any effect on the magnet, as it is a non-magnetic material.