Galileo Galilee dropped two balls off of the top of the Leaning Tower of Pisa. One was wooden and the other was a cannon ball. He dropped them at the same time to see which one would hit the ground first.
Gallileo. He did this as part of an experiment to see if balls of different masses/sizes fell at different rates (which he discovered they do not).
Galileo did.
198 feet 10.66 inches
Due to the force of gravity. The gravitational attraction between the Earth and the ball is what causes the ball to drop.
They will fall at the same rate, for more information Google "why was the leaning tower of Pisa built"
mass x velocity = momentum
A cannon ball.
a cannon ball
the size of the cannon ball depends on the size of the cannon. civil war cannons had cannon balls about the size of a child's head, aprox 30cm across
cannon ball
Yes, both have the same energy, but because cannon is heavier the cannon ball gets more momentum and thus greater velocity.
Momentum. Momentum is the mass of an object multiplied by its velocity. This is expressed as: p=mv where p is the momentum, m is the mass, and v is the velocity. Also, kinetic energy, as that is 1/2 m*v^2.
The cannon would want to move backwards with the same speed as the ball wants to move forward.