Question 158 of 210

The coefficient of static friction between two blocks is $0.5$ and the table is smooth. The maximum horizontal force that can be applied to move the blocks together is _______$N$ (take $\left.g=10{ms}^{-2}\right)$

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Answer: 15

For ${F}_{\max }$ with relative rest, ${f}_{s}$ between
2kg&1kg must be maximum.

${A}_{common}\leq {a}_{\max }$
$\dfrac{F}{3}\leq \dfrac{10}{2}$
$F\leq 15$