Natural Science
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求過程感謝(◍•ᴗ•◍)（b=10.9m）(c=25.1度)
31. (II) A medieval catapult, as in Fig. 4.39, could project a 75-
kg stone at 50 m/s at 30° above the horizontal. Suppose the
target is a fortress wall of height 12 m at a horizontal dis-
tance of 200 m. (a) Would the stone hit the wall? (b) If so, at
what height, and (c) at what angle?
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