Posted by **bec** on Monday, November 7, 2011 at 8:23pm.

a boy stands on a cliff overlooking a lake below. He throws a rock at an initial velocity of 8.0m/s,at an angle 25 degrees above the horizontal. The lake's surface is 4.5 m lower than the point the rock was released. Find the speed of the rock just before it hits the surface of the water. Ignore air friction.

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