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57.

57. III A lead ball is dropped into a lake from a diving board 5.0 m above the water. After entering the water, it sinks to the bottom with a constant velocity equal to the velocity with which it hit the water. The ball reaches the bottom 3.0 s after it is released. How deep is the lake? 59. II A basketball player can jump to a height of 55 cm. How far above the floor can he jump in an elevator that is descending at a constant 1.0 m/s?63. || A very slippery block of ice slides down a smooth ramp tilted at angle 9. The ice is released from rest at vertical height )1 above the bottom of the ramp. Find an expression for the speed of the ice at the bottom. 67. || Nicole throws a ball straight up. Chad watches the ball from a window 5.0 m above the point where Nicole released it. The ball passes Chad on the way up, and it has a speed of 10 mls as it passes him on the way back down. How fast did Nicole throw the ball