The friction coefficient between A & B is μ1=0.25 and between B & floor is μ2=0.2. The horizontal force F needed to move the block B is :

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500 N

1100 N

1500 N

2200 N

answer is B.

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Detailed Solution

f1=0.25×2000 = 500 Nf2=0.2(200+300)×10=1000NF=f1+f2=1500N

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