Science

Force and Pressure

Pressure

You have learnt In Class VII that strong winds during a storm or a cyclone can blow away even the roof-tops. You also learnt that winds and cyclones are caused by the differences In air pressure. Is there any relation between pressure and force? Let us find out. Try to push a nail Into a wooden plank by Its head. Did you succeed? Tty now to push the nail by the pointed end . Could you do It this time?Try cutting vegetables with a blunt and a sharp knife. Which is easier?Do you get the feeling that the area over which the force is applied (for example, the pointed end of the nail) plays a role Is making these tasks easier? The force acting on a unit area of a surface is called pressure.