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24 March, 09:50

A uniform crate with a massof 30 kg must be moved up along the 15° incline without tipping. Knowing that force P is horizontal, determine (a) the largest allowable coefficient of static friction between the crate and the incline, (b) the corresponding magnitude of force P.

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  1. 24 March, 12:58
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    coefficient of friction = 0.268

    magnitude of force P=289.78N

    Explanation:

    The coefficient of friction is obtained by mgsinФ/mgcosФ=tanФ=tan15=0.268

    force P is horizontal as stated in the question, horizontal component of P=mgcosФ=30*10*cos15=289.78
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