Atwood Machine

Q. An Atwood machine is set up like the figure which is given below.
If $m_1=6.0kg$ and $m_2=4.5kg$. What is the acceleration of the system when the masses are released? (Take the value of $g=10m{s}^{-2}$)

1. $\frac{10}{7}m{s}^{-2}$
2. $\frac{20}{7}m{s}^{-2}$
3. $\frac{10}{3}m{s}^{-2}$
4. $\frac{20}{3}m{s}^{-2}$

Q. An Atwood machine is set up like the figure below. If $m_1=5.0kg$ and $m_2=15kg$. What is the tension in the rope? Take the value of $g=10m{s}^{-2}$)

1. $25N$
2. $100N$
3. $50N$
4. $75N$