A mountain climber stands at the top of a 50 m cliff that over hangs a calm pool of water. She throws two stones vertically downward 1.00 sec apart and observes that they cause a single splash. The first stone had an initial velocity of -2.00 m/s (a) how long after release of the first stone did the two stones hit the water? (b) What initial velocity must the second stone have had, given that they hit the water simultaneously? (c) What was the velocity of each stone at the instant it hit the water?