Question

Two masses $m_{1}$ and $m_{2}$ are attached to a string which passes over a frictionless smooth pulley. When $m_{1}=10\, kg$, $m_{2}=6\, kg$, the acceleration of masses is

• A. $20\, m / s^{2}$
• B. $2.5\, m / s^{2}$
• C. $5\, m / s^{2}$
• D. $10\, m / s^{2}$

Answer 1

Answer: (B)

Acceleration of the system,br/> $a=\frac{m_{1}-m_{2}}{m_{1}+m_{2}} g=\frac{10-6}{10+6} \times$
$g=2.5\, m / s ^{2}$