Posted by **liz** on Thursday, March 29, 2012 at 11:56pm.

A rock thrown horizontally from a bridge hits the water below at a horizontal distance x directly below the throwing point. The rock travels a smooth parabolic path in time t.

A.) Show that Therapy vertical distance of the bridge above water is 1/2gr2.

B.) What is the height of the bridge if the time of the rock is airborne is 2 seconds?

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