本题目来源于试卷: Physics Unit6: Work and Energy，类别为 通用国际物理
[单选题]
A projectile of mass m leaves the ground w5* i dw 7ozqnxh.g d2*9qj+slaith a kineti vbzils:2:dpf qos4- ip5j1z5 c energy of 220 J. At the highest point ils5 izfv :z45-ij:1 oqspp d2bn its trajectory, its kinetic energy is 120 J. To what vertical height, relative to its launch point, did it rise?
A. $\frac{220}{mg} \; m$
B. $\frac{120}{mg} \; m$
C. $\frac{100}{mg} \; m$
D. Impossible to determine without knowing the angle of launch
参考答案: C
本题详细解析:
暂无
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