Answer to Question #73875 in Mechanics | Relativity for Khyu

Question

An inquisitive physics student and mountain climber climbs a 50m cliff that overhangs a calm pool of water. He throws two stones vertically downwards 1s apart and observes that they cause a single splash. The first stone has an initial velocity of 2ms^-1.
(a) At what time after release of the first stone will the two stones hit the water?
(b) What is the initial velocity that the second stone should have if they are to hit simultaneously?
(c) What will the velocity of each stone be at the instant they hit the water?