A student climbs a cliff that is 48 m above a calm pool of water. From the top of the cliff she throws two rocks vertically downward, 1.3 s apart, and observes that they cause a single splash. The first rock has an initial speed of 2.7 m/s.
Part A Consider the first rock as it travels from the top of the cliff to the pond. How long after it's release does the first rock hit the water? Give you answer in seconds, to 3 significant figures