Question

The coefficient of static friction between the two blocks is 0.363. What is the minimum acceleration(approximate value) of block 1 so that block 2 does not fall?

• A. $6{\text{ms}}^{-2}$
• B. $12{\text{ms}}^{-2}$
• C. $18{\text{ms}}^{-2}$
• D. $27{\text{ms}}^{-2}$

Answer 1

The correct option is D $27{\text{ms}}^{-2}$


For equilibrium of 2
$\mu m_{2}a=m_{2}g$
$a=\frac{g}{\mu }$
$a=\frac{9.8}{0.363}=27{\text{m/s}}^2$
$a=27{\text{m/s}}^2$