Two Packages Are Connected by a Very Light String That

question 46

Short Answer

Two packages are connected by a very light string that goes over an ideal pulley as shown in the figure.Package A has a mass of 3.0 kg and can slide along a rough plane inclined at 30° above the horizontal.The string pulls on package A parallel to the surface of the plane.The coefficient of static friction between package A and the plane is 0.40.What minimum mass should package B have in order to start package A sliding up the ramp?

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