[填空题]
A 0.25-kg skeet (clay targesl*)dzb0f/ jl a9q l i9suq llz78a-4bgjs : r ie*k3i/pso*):bzget2 t) is fired at an angle of 30 $^{\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? $\approx$
