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Question

The coefficient of static friction μo between block A of mass 2 kg and the table as shown in the figure is 0.2 What would be the maximum mass value of block B so that the blocks do not move? The string and the pulley are asumed to be smooth and massless.
(g=10m/s2)
1490281_8d0e7eef1b0c4a209bf4377fa0927260.png

A
2.0 kg
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B
4.0 kg
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C
0.2 kg
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D
0.4 kg
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Solution

The correct option is C 0.2 kg
ApplyconditionofnoslippingT<0.1×NTmax=0.1×20=2Tmax=Mmax×g2=M×10M=0.2
Hence, Option C is correct.

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