Space Time & Motion A.3 Work Energy and Power (id: 3673b82b4)

本题目来源于试卷: Space Time & Motion A.3 Work Energy and Power，类别为 IB物理学

[单选题]
A trapeze artist is swinging from position A to position C as shown in the diagram.



The combined mass of the artist and the swing is $70\,kg$ and the length of the rope of the swing is $L$.

Which expression gives the kinetic energy at position B?

A. $\frac{L(T-700)}{2}$
B. $\frac{LT}{2}$
C. $LT$
D. $\frac{L(T+700)}{2}$


参考答案:  A


本题详细解析:

微信扫一扫，分享更方便