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What is the maximum angle of the ramp (angle of repose) at which the box shown in the exhibit will just barely be able to remain stationary, if the co-efficient of friction is 0.25? Exhibit Vi 100 lb POSSIBLE ANSWERS: С 28 degrees С 20 degrees С 14 degrees 10 degrees C

engineering   Mechanical-Engineering   
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do σο Sin θ= 0.25

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