[填空题]
A 0.25-kg skeet (clay target) is fi4 e t* qkrw15v.gw,;pf 8k/mgk,l euilred at an angle of 3/b6z+ w)g zmme0 $^{\circ} $ to the horizon with a speed of 25m/s (Fig. 7–45). When it reaches the maximum height, it is hit from below by a 15-g pellet traveling vertically upward at a speed of 200m/s The pellet is embedded in the skeet.
(a) How much higher did the skeet go up? m
(b) How much extra distance, $\Delta{x}$ does the skeet travel because of the collision? $\approx$
