[单选题]
A trapeze artist is swinging from position A tbydahlfb3i(7i;9)g e ks4 4ioo position C as shown in theg.spr lm0 72vuq 1di2w diagram.2 .p01mlwq2 dgsuiv7r
[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. $\frac{L(T+700)}{2}$
