PDF chapter test TRY NOW
Take a good quality rubber sucker. It looks like a small rubber cup. Press it hard on a smooth plane surface. Does it stick to the surface? Now try to pull it off the surface. Can you do it?
a. The majority of the air between the sucker's cup and the surface as we press it.
b. The applied force must be sufficiently strong to overcome in order to lift the sucker off the surface.
Register for free to see more content