Space Time & Motion A.2 Forces & Momentum (id: 02858890b)

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]
Three identical masseq1y 4r:()nr5f*c1map mnbu j0+pv; p ar:u hpqs ag a ;x*yvzpczj5tu(r2-2. vxure connected as shown with a string that passes over an ideal puvu.vryx( ag2p2 5jzxt;uzc*- lley. The tension in the string connecting $m_1$ and $m_2$ is $T_1$
. The tension of the string attached to $m_3$ is $T_2$
The acceleration of the $m_3$ is $\frac{g}{4}$
Which of the following is correct for $T_2$ and the acceleration of $m_1$

A. $\frac{5T_1}{3}$ -$\frac{g}{4}$
B. $\frac{3T_1}{5}$ $\frac{g}{4}$
C. $\frac{5T_1}{3}$ $\frac{g}{4}$
D. $\frac{3T_1}{5}$ -$\frac{g}{4}$


参考答案:  A


本题详细解析:
All of the masses are q k 5sh-+,;9k*pmhcgfpp ;z zvconnected therefore the magnitude of the acceleration is the same for zv;p z*hgc,+phm;qpk-9k5s fall of them. But $m_1$ is accelerating in the opposite direction to the direction of $m_3$ Therefore, the acceleration of the $m_1$ is $\frac{g}{4}$ ​ When Newton's second law is applied to $m_1$ .

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