Tennis and Cannonball falling stairs

This is an exercise that shows different types of balls with different weights falling stairs.
The cannonball is a heavy ball and because of that it will have fewer bounces, and because of the gravity it will continue to roll over the stairs. The tennis ball because it's lighter will have more bounces and will keep bouncing while falling down the stairs.
In this example I heaven't show really well what happens with the cannonball because I should have made some more little bounces when it's touching the stairs, but I think the main idea of heaviness is there.