physics
posted by Anonymous .
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

1/2 m v^2=95*.79
solve for v. 
Work done on arrow = 95N*0.79 m = 75 J
Set that equal to the arrow kinetic anergy ans solve for V