as Bob has just nished climbing a sheer cliff above a level beach and wants to gure out how high he climbed. All he has to use is a baseball, a stopwatch, and a friend on the ground below with a long measuring tape; Bob is a pitcher and knows that the fastest he can throw the ball is about ya = 34.5 ms. Bob starts the stopwatch as he throws the ball, with no way to measure the balls initial trajectory, and watches carefully; The ball rises and then falls, and after II = 0.510 s the ball is once again level with Bob; Bob cannot see well enough to time when the ball hits the ground. Bob's friend then measures that the ball hit the ground .7: = 124 m from the base of the cliff. How high above the beach was the ball when it was thrown? \"s 'nacmillan Learnin v __-..__ n -* '-c 'h M J K'JII r ............................................... a \\ x \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ 1\" ll