In the diagram shown, the blocks A, B and C weight 3 kg, 4 kg and 5 kg respectively. The coefficient of sliding friction between any two surfaces is 0.25. A is held at rest by a massless rigid rod fixed to the wall while B and C are connected by a light flexible cord passing round a frictionless pulley. The force F necessary to drag C along the horizontal surface to the left at constant speed is (Assume that the arrangement shown in the diagram, B on C and A on B is maintained all through and g=10 m/s2)

In the diagram shown, the blocks A, B and C weight 3 kg, 4 kg and 5 kg

1.	In the diagram shown, the blocks A, B and C weight 3 kg, 4 kg and 5 kg respectively. The coefficient of sliding friction between any two surfaces is 0.25. A is held at rest by a massless rigid rod fixed to the wall while B and C are connected by a light flexible cord passing round a frictionless pulley. The force F necessary to drag C along the horizontal surface to the left at constant speed is (Assume that the arrangement shown in the diagram, B on C and A on B is maintained all through and g=10 m/s2)
Answer» In the diagram shown, the blocks $A, B$ and $C$ weight $3 kg$ , $4 kg$ and $5 kg$ respectively. The coefficient of sliding friction between any two surfaces is $0.25$ . $A$ is held at rest by a massless rigid rod fixed to the wall while $B$ and $C$ are connected by a light flexible cord passing round a frictionless pulley. The force $F$ necessary to drag $C$ along the horizontal surface to the left at constant speed is (Assume that the arrangement shown in the diagram, $B$ on $C$ and $A$ on $B$ is maintained all through and $g = 10 {m/s}^{2}$ )

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