Question

A block of mass m_1 is connected by a string over a pulley to a block of mass m_2 that is sliding on a flat table. The string is light and does not stretch; the pulley is light and turns without friction. The coefficient of friction between the sliding block and the table is μ. A force F is also applied to m_1 at an angel of θ° with the horizontal:

i) Find the tension of the box.
ii) what is the change in each block's velocity over a 2 second interval?

I found that the blocks' acceleration is a=(-m_1gsinθ-m_2gcosθ)/(m_1+m_2)