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GATE2020-ME-2: 5

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An attempt is made to pull a roller of weight $W$ over a curb (step) by applying a horizontal force $F$ as shown in the figure. 

The coefficient of static friction between the roller and the ground (including the edge of the step) is $\mu$ Identify the correct free body diagram (FBD) of the roller when the roller is just about to climb over the step.

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B

1. When the cylinder is about to make out of the ditch, it will loose contact point at A, only contact will be at B.

2. Even the surfaces are rough but there will be no friction at B for the said condition. ( Contact surface is just a point contact)

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