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1irishman
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Homework Statement
From the top of a 40m high cliff, two rocks are simultaneously thrown. One is thrown upwards at 20m/s, the other is thrown downwards at 8.0m/s. How far apart are the two rocks after 1.5 seconds?
Homework Equations
vf = vi + at
d = Vavg * t
d = vit + 1/2 at^2
vf^2 = vi^2 + 2ad
The Attempt at a Solution
I've enclosed the above equations, but I've not established which ones' are going to be helpful in arriving at the answer yet. I'm trying find the solution now, but wanted to post it up here to check my solution with whomever comes up with the right answer. Thanks! :-)