The earth attracts all bodies left near it, so that::

· If the medium is a vacuum, the body falls to earth with a constant acceleration of 9.8 m/s2

· If the fall is through the air, there is resistance which depends on the shape of the body and the density of the air.

· When heavy aerodynamic bodies fall from a low height, the resistance of the air can be ignored.

   We suggest that you investigate on your own the mistake that is made when the resistance of the air is ignored in the fall time of the heaviest body in each of the three shapes the experiment allows you to use.

To see the experiment visual click here.