5-49 할리데이 11판 솔루션 일반물리학

$$\begin{cases} N_a&=20.0\ut{N}\\ N_b&=10.0\ut{N}\\ \Sigma m&=15.0\ut{kg} \end{cases}$$ $$\Sigma \vec F = m\vec a,$$ $$\begin{cases} \Sigma F_{aA} &= m_{aA} a_{aA}\\ \Sigma F_{aB} &= m_{aB} a_{aB}\\ \Sigma F_{bB} &= m_{bB} a_{bB}\\ \Sigma F_{bA} &= m_{bA} a_{bA}\\ \end{cases}$$ $$\begin{cases} \Sigma F_{aA} &= m_{A} a_{a}\\ \Sigma F_{aB} &= m_{B} a_{a}\\ \Sigma F_{bB} &= m_{B} a_{b}\\ \Sigma F_{bA} &= m_{A} a_{b}\\ \end{cases}$$ $$\begin{cases} F_a-N_a &= m_{A} a_{a}\\ N_a &= m_{B} a_{a}\\ F_a-N_b &= m_{B} a_{b}\\ N_b &= m_{A} a_{b}\\ \end{cases}$$ $$\ab{a}$$ $$\begin{cases} a_a&=2.00\ut{m/s^2}\\ a_b&=2.00\ut{m/s^2} \end{cases}$$ $$\ab{b}$$ $$\begin{aligned} F_a&=30.0\ut{N} \end{aligned}$$