2. The 2 kg block was worked on from A to B. Friction is 10N from B to C. Calculate the speed at C, if it starts from rest. Distance from A to B is 3m. $F_{ap} = 30N$
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- Work done = Force x Distance - Work done = 0 (since no force is acting from A to B) Show more…
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Block $A$ of mass $35 \mathrm{~kg}$ is resting on a frictionless surface and another block $B$ of mass $7 \mathrm{~kg}$ is resting on it as shown in the figure The coefficient of friction between the blocks is $0.5$ while kinetic friction is $0.4$ A forec of $100 \mathrm{~N}$ is applied to block $B \cdot\left(\mathrm{g}=10 \mathrm{~ms}^{-2}\right)$ If $m_{A}=10 \mathrm{~kg}, m_{B}=40 \mathrm{~kg}$ and applied force is $40 \mathrm{~N}$, the acceleration of the block $B$ with respect to block $A$ will be (a) \%ero (b) $0.5 \mathrm{~ms}^{-2}$ (c) $2.5 \mathrm{~ms}^{-2}$ (d) $0.8 \mathrm{~ms}^{-2}$
Laws of Motion and Friction
Section C
Block $A$ of mass $35 \mathrm{~kg}$ is resting on a frictionless surface and another block $B$ of mass $7 \mathrm{~kg}$ is resting on it as shown in the figure The coefficient of friction between the blocks is $0.5$ while kinetic friction is $0.4$ A forec of $100 \mathrm{~N}$ is applied to block $B \cdot\left(\mathrm{g}=10 \mathrm{~ms}^{-2}\right)$ If $m_{A}=10 \mathrm{~kg}, m_{B}=40 \mathrm{~kg}$ and applied forcc is $40 \mathrm{~N}$, the acceleration of the block $B$ with respect to block $A$ will be (a) $\% \mathrm{cr} \theta$ (b) $0.5 \mathrm{~ms}^{-2}$ (c) $2.5 \mathrm{~ms}^{-2}$ (d) $0.8 \mathrm{~ms}^{-2}$
Block $A$ of mass $35 \mathrm{~kg}$ is resting on a frictionless surface and another block $B$ of mass $7 \mathrm{~kg}$ is resting on it as shown in the figure The coefficient of friction between the blocks is $0.5$ while kinetic friction is $0.4$ A forec of $100 \mathrm{~N}$ is applied to block $B \cdot\left(\mathrm{g}=10 \mathrm{~ms}^{-2}\right)$ If $m_{A}=10 \mathrm{~kg}, m_{B}=40 \mathrm{~kg}$ and applicd forec is $40 \mathrm{~N}$, what will be the acceleration of the system? (a) $\% \mathrm{cr} 0$ (b) $0.5 \mathrm{~ms}^{-2}$ (c) $50 \mathrm{~ms}^{-2}$ (d) $0.8 \mathrm{~ms}^{-2}$
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