[单选题]
Three identical mass
xqfet o+ hd 5-8m-x-w/g*8tebi as,u0pgo2rses are connected as shown with a s
hotk 7(yxt+o :cljs:5 tring that passes over an ideal pulley. The tension in
ltc x7t(s +ojh:k5oy: 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 connected therefore the magnitude o
*ru/xhc-scl 6 f the acceleration is the same for all of them.
*h6r-ucc xs/ l 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 $m_1$
.
