Asked by Emily

An astronaut is stranded on another planet with UNKNOWN GRAVITY. He conducts two experiments. In the first, he drops a rock from a cliff and he finds that it takes the rock 4.15 seconds to reach the ground at the base of the cliff. In the second experiment, he throws the rock straight up to a heights he determines to be 2 meters before it falls to the ground at the base of the cliff with the first rock. The time for the second rock to reach the ground is 6.3 seconds. How high is the cliff?
Answered by Damon
That sure looks familiar
Answered by Damon
http://www.jiskha.com/display.cgi?id=1450909117
Answered by Emily
I reposted it again because I wasn't sure if anyone got it.
Answered by Emily
oh I apologize. It wasn't loading on my device. Thankyou Mr.Damon
Answered by Damon
You are welcome. Check my algebra of course.
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