Question

Two masses m_A = 2.8 kg and m_B = 6.2 kg are on inclines and are connected together by a string as shown in the figure. 

Ignore masses of the frictionless pulley and the cord.

The coefficient of kinetic friction between each mass and its incline is μ_k=0.34. If m_A moves up, and m_B moves down, determine their acceleration.

Answer 1

Answer

In this case the acceleration can given as

$a=\frac{m_Agsin\theta_1-m_Bgsin\theta_2-F_A-F_B}{m_A+m_B}$

So these required formula.