Homework Help: physics

Posted by Anonymous on Monday, January 3, 2011 at 10:21pm.

An 81 g arrow is fired from a bow whose string exerts an average force of 95 N on the arrow over a distance of 79 cm. What is the speed of the arrow as it leaves the bow?
m/s

physics - bobpursley, Monday, January 3, 2011 at 10:33pm
1/2 m v^2=95*.79
solve for v.
physics - drwls, Monday, January 3, 2011 at 10:33pm
Work done on arrow = 95N*0.79 m = 75 J

Set that equal to the arrow kinetic anergy ans solve for V

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