A mountain climber stands at the top of a 70.0m cliff hanging over an ocean. The climber throws thwo stones vertically 1.5s apart and observes that they cause a single splash when they hit the water. The first stone has an initial velociy of +2.0m/s
How long after the reliease of the first stone will the two stones hit the water?
What is the initial velocityt of the second stone?
I have no idea how to do this! Please help