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[" Two blocks "A" and "B" of mass "120N]...

[" Two blocks "A" and "B" of mass "120N],[m_(A)=10kg" and "m_(B)=20kg],[" are place on rough horizontal "],[" surface on rough horizontal with a string.If the coefficient "],[" of friction between block "A" and ground is "mu_(A)=0.9" and between "],[" block "B" and ground is "mu_(B)=0.3," find the tension in the string "],[" in situation as shown in figure.Forces "120N" and "100N" start "],[" acting when the system is at rest? "]

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