本题目来源于试卷: Work Energy and Power，类别为 美国物理杯赛(Physics Bowl)
[单选题]
04.48: Two identical ai3m m-9/ qgo1)zxwec 1l5xuce51zxyb m6k*;gksi1w kiy3 -ifowling balls A and B are each dropped from rest from the top of a tall tower. Ball A is drop3igik1 -f k*6ywim ks;ped one second before ball B. After ball B is dropped but before ball A strikes the ground, how are the mechanical energies of the two balls changing?
A. The difference between the mechanical energy of ball A and the mechanical energy of ball B is increasing
B. The difference between the kinetic energy of ball A and the kinetic energy of ball B is increasing
C. The difference between the kinetic energy of ball A and the kinetic energy of ball B is increasing
D. Only the difference between the kinetic energies of the balls remains constant
E. The difference between the potential energies of the balls remains constant, and the difference between the kinetic energies of the balls remains constant
参考答案: B
本题详细解析:
暂无
| 
