[填空题]
A golf ball of mass 0.045 kg is hit off the tee atyt aa *m*l:3ho a speed of 4+5,mw l*t 8abveq u(2bw yg6ph5m/s The golf club was in con 5b(b6ut+l*waghv 8 ypwe2,qmtact with 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
