How to practice concept:free-body-diagrams

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Question 5

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MEMCQ1 markNeeds review
An attempt is made to pull a roller of weight

over a curb (step) by applying a horizontal force

as shown in the figure.
Diagram for Mechanical Engineering question 5

The coefficient of static friction between the roller and the ground (including the edge of the step) is

. 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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