Thames & Kosmos Magnetic Science Experiment Manual page 12

10
Penetrating
force
YOU WILL NEED
→ block magnet
→ iron rod
→ cardboard, paper, knife
made of steel, plastic wrap,
fabric, aluminum foil
→ ruler
HERE'S HOW
1. Place the iron rod on a smooth
table surface and see how close
you can bring the block magnet before
the rod starts to roll toward it. Make a
note of the distance between magnet
and rod when that happens.
2. Now slide a piece of cardboard in front
of the block magnet.
Is there a difference now in the distance
at which the rod starts to roll toward it?
Test the other materials as well by
sliding them in front of the block
magnet.
EXPERIMENT 7
1
2