You and a friend are doing a free fall demonstration where one of you drops a tennis ball from the top of a tall building while the other throws a second tennis ball from the same starting height The

You and a friend are doing a free fall demonstration where one of you drops a tennis ball from the top of a tall building while the other throws a second tennis ball from the same starting height

The first tennis ball was dropped from a height of 20.0 meters. Assume g=9.81m/s^2

The second tennis ball was thrown down with an initial velocity of -4.00m/s from the same starting height of 20.0 meters

Find the fall time and final velocity of the dropped tennis ball

Find the fall time and final velocity of the thrown tennis ball