本题目来源于试卷: Physics Bowl by Topic 4: Kinematics - part III Projectile Motion，类别为 美国物理杯赛(Physics Bowl)
[单选题]
00.37: During a recent winter storm, bales of hay had to be dropcr7lz1;vahh04v,v gf ped frr4ju3:sj8u o rom an airplane to a herd of cattle below. Assume the airplane flew horizontally at an altitude of 180 m with a constant velocity of 50 m/s and dropped one bail of hsuro4u j83j:r ay every two seconds. It is reasonable to assume that air resistance will be negligible for this situation. As the bales are falling through the air, what will happen to their distance of separation?
A. the distance of separation will increase
B. the distance of separation will decrease
C. the distance of separation will remain constant
D. the distance of separation will depend on the mass of the bales
E. none of the above are always true
参考答案: A
本题详细解析:
暂无
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