(b) $a = \left( \frac{m_{1} - m_{2}}{m_{1} + m_{2}} \right)g \Rightarrow \frac{g}{8} = \left( \frac{m_{1} - m_{2}}{m_{1} + m_{2}} \right)g \Rightarrow \frac{m_{1}}{m_{2}} = \frac{9}{7}$
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.