A lead ball is dropped into a lake from a diving board 9.10 meter above the water. After entering the water, it sinks to the bottom with a fix velocity equivalent to the velocity with which it hit the water. The ball reaches the bottom 4.06 s after it is released.
A) Find with what velocity does ball hit the water surface?
B) Find what time is required for the ball to reach the surface of the water?
C) Estimate how deep is the lake?