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May 26, 2015

Homework Help: Physics

Posted by Anon on Tuesday, September 4, 2007 at 9:51pm.

A rock is thrown vertically with a velocity of 21 m/s from the edge of a bridge 41 m above the river. How long does the rock stay in the air?

V = 21 m/s
d = 41 m
a = -9.80 m/s^2
t = ?

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