JEE Class main Answered
please solve the 14th question!!
Asked by amritchirania | 01 Sep, 2019, 06:19: PM
Expert Answer
Free body diagram of all the three blocks are shown in figure . W is weight or gravitational force acting on the block,
R is the normal reaction force acting on each block and F is the applied force.
fA , fB and fC are the friction force acting at the contact surfaces.
Limiting friction force acting on block-A, fA = μ R = 0.3×300 = 90 N
Limiting friction force acting on block-B, fB = μ R = 0.2×400 = 80 N
Limiting friction force acting on block-C, fC = μ R = 0.1×600 = 60 N
since block-C requires least limiting force 60 N, least horizontal force required to move the system is 60 N
Answered by Thiyagarajan K | 01 Sep, 2019, 08:06: PM
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