A stone is thrown off a cliff upward at a rate of 10 m/s. It then falls from the height of the throw down into a lake 20M below. How long does it take for the stone to fall? What is its impact velocity? What is the height of the cliff?
The Attempt at a Solution
20=0+0+1/2(9.8 x t^2)
a=acceleration of gravity (9.8)
Can someone help me to find the height of the cliff? I got the time and impact velocity but am unsure of how to get the heigh of the cliff. Thanks! :)