[填空题]
An 0.145-kg baseball pitched horizontally at strikek +,kt3 8) zsob-2pcjaaj7n lhs a bat ande (sh/uv(qjr- is popped straight up to a height of 55.6 m. If the contact time is 1.4 ms, calculate the average force hv(j r-u/q(se on the ball during the contact. $^{\circ} $
