Blocks \( A \) and \( B \) shown in the figure are connected with a bar of negligible weight. \(....
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Blocks \( A \) and \( B \) shown in the figure are connected with a bar of negligible weight. \( A \) and \( B \) each has mass \( 170 \mathrm{~kg} \), the coefficient of friction between \( A \) and the plane is 0.2 and that
P
between \( B \) and the plane is \( 0.4\left(\mathrm{~g}=10 \mathrm{~ms}^{-2}\right) \)
What is the force acting on the connecting bar?
(1) \( 150 \mathrm{~N} \)
(2) \( 100 \mathrm{~N} \)
(3) \( 75 \mathrm{~N} \)
(4) \( 125 \mathrm{~N} \)
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