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]
Consider two masses c0kll ::so/m-l 2l xhvzc*1e+ulsi s7(f lb0 j$m_{1}$ and $m_{2}$ at the top of two frictionless inclined planes. Both masses start from rest at the same height. However, the plane on which $m_{1}$ sits is at an angle of $30^{\circ}$ with the horizontal, while the plane on which $m_{2}$ sits is at $60^{\circ}$. If the masses are released, which is going faster at the bottom of its plane?
A. $m_{1}$
B. $m_{2}$
C. They both are going the same speed.
D. cannot be determined without knowing the masses
参考答案: C
本题详细解析:
暂无
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