Homework Help: physics

Posted by R on Monday, September 19, 2011 at 11:46pm.

A stone falls from rest from the top of a cliff.
A second stone is thrown downward from the
same height 3.3 s later with an initial speed of
64.68 m/s. They hit the ground at the same
time.
The acceleration of gravity is 9.8 m/s2 .
How long does it take the first stone to hit
the ground?

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