\magnification=\magstep1

$$
\eqalign{
x: \quad \quad T \ - \ m_A g \sin(\theta) \ - \ \mu_k F_n \quad &= \quad m_A a_x \cr
y: \quad \quad \quad \quad \quad \quad F_n \ - \ m_A g \cos(\theta) \quad &= \quad 0 \cr
}
$$

$$
F_n \quad = \quad m_A g \cos(\theta)
$$

$$
T \ - \ m_A g \sin(\theta) \ - \ \mu_k m_A g \cos(\theta) \quad = \quad m_A a_x 
$$


$$
\eqalign{
x: \quad \qquad \qquad 0 \quad &= \quad 0 \cr
y: \quad T \ - \ m_B g \quad &= \quad -m_B a_y \cr
}
$$

$$
T \quad = \quad m_B g \ -\  m_B a_y
$$

$$
m_B g \ - \ m_B a \ - \ m_A g \sin(\theta) \ - \ \mu_k m_A g \cos(\theta) \quad = \quad m_A a
$$





\bye
