D.) How can you demonstrate the magnetic force? Write with an example e.)How does frictiorial force produce? Write down any two effects of
friction

Explanation:

d) Magnetic force is the power that pulls materials together (magnet e. g iron)

an example :how magnet can pick up a coin.

e) frictional force produces when two surfaces are in contact with each other.

effects of friction : I) it produces heat

II) it causes loss in power.