The block $\mathrm{A}(8 \mathrm{~kg})$ and $\mathrm{B}(4 \mathrm{~kg})$ are placed on a smooth surfa

Question

The block $\mathrm{A}(8 \mathrm{~kg})$ and $\mathrm{B}(4 \mathrm{~kg})$ are placed on a smooth surface as in the figure. A horizontal force $\mathrm{F}=36 \mathrm{~N}$ is applied on the block A . The horizontal force acting on the block B is

Professor PC Thomas Classes · Answer

Total mass = $8+4 = 12 \mathrm{kg}$. Common acceleration $a = \frac{36}{12} = 3 \mathrm{m/s}^2$. Force on B = $m_B a = 4 	imes 3 = 12 \mathrm{N}$.