Can anyone help me out with some free fall equations? and: Assume: g = 9.8 m/s A stone falls from rest from the top of a cliff. A second stone is thrown downward from the same height 2.1 seconds later with an initial speed of 41.16 m/s. They hit the ground at the same time. How long does it take the first stone to hit the ground? Answer in units of seconds. How high is the cliff in meters.