[填空题]
An 88-g arrow is fired from a,e s0ectu ) q b13u0e pox)*i2bli,dfv bow whose string exerts7bv-ecq-n7hx1d ul w , an average force of 110 N on the arrow over a distanc7-e 1 nqx7duv,hwblc -e of 78 cm. What is the speed of the arrow as it leaves the bow? m/s