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From: Silpa Y
Date: 9/5/07
Time: 3:12:33 PM
Remote Name: 24.210.246.145
To do this problem, we first realize that since both objects are in free fall despite the fact that they are thrown in different directions, so their acceleration is -9.8 m/s2. To get the time until the first splash (heather's rock), you first need the final velocity of that rock. Use the equation (Vx)f2 = (Vx)i2 + 2(a)(changeX). Then plug that value into the equation: changeT= Changevelocity divided by acceleration. For the 2nd splash, we do the same exact thing. The difference between the two times is caused by a difference in the initial velocity of each rock (I won't give it away totally!)