Block $A$ of mass $30\, kg$ . is resting on a frictionless floor. Another block $B$ of mass $5\, kg$ is resting on it as shown in the figure. The coefficient of static friction between the blocks is $0.4$ while kinetic friction is $0.3$. If a horizontal force of $175\, N$ is applied to block $B$ , then the acceleration of the block $A$ will be ........ $m/s^2$ $(g = 10\, m/s^2 )$
Medium
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since both block will move separatiy, therefore
$\Rightarrow \quad 15=30 \mathrm{a} \Rightarrow \mathrm{a}=0.5 \mathrm{m} / \mathrm{s}^{2}$
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