[填空题]
A golf ball of mass 0.045 kixm),.u5 cct rg i5da ,:cdww+u 5hc(l uss hit off the tee at a speed of 45m/s The golf club was in contact with:udlh5cwu a+(d,w5s c the ball for $3.5\times10^{-3}$s Find (a) the impulse imparted to the golf ball, kg*m/s
(b) the average force exerted on the ball by the golf club. N
