[填空题]
A golf ball of mass 0.045 kg is x3q7yvaq3wp /hit off ep*0f b*1na 1ybywxib+ ,rht 1the tee at a speed of 45m/s The golf club wa ynbpt1e10*h,* bw yixb+fa1 rs in contact 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
