Learning Introductory Physics with Activities

A box ($m_1=10.5\mathrm{kg}$) is on an inclined plane with negligible friction between the box and the incline. This box is attached via an ideal string and pulley to the hanging mass ($m_1=5.5\mathrm{kg}$), as shown. The incline make an angle of 20.0° with respect to the horizontal. Use $g=9.80\mathrm{m}/{\mathrm{s}}^2\text{.}$ Rank the magnitude of accelerations for $m_1$ and $m_2\text{.}$ Do we necessarily know the direction of acceleration of $m_1$ without doing any calculations? Find the magnitude of acceleration for $m_1\text{.}$ What direction is the acceleration of $m_1\text{?}$