Space Time & Motion A.2 Forces & Momentum (id: 803919e93)

本题目来源于试卷: Space Time & Motion A.2 Forces & Momentum，类别为 IB物理学

[单选题]
A trapeze artist is swinging from position A1s41 ofzai67xuym a rn1.ydo * to 987sky l3c+fh( mdar5 g uxh6kposition C as shown in the diagram.r shyg alm3kcd6u 98(5h7xf k+


[Source: Image created using Images by OpenClipart-Vectors from Pixabay - https ://pixabay.com]
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:

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