A 1.2-m plank with a mass of 3 kg rests on two joists. Knowing that the coefficient

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A 1.2-m plank with a mass of 3 kg rests on two joists. Knowing that the coefficient of static friction between the plank and the joists is 0.30, determine the magnitude of the horizontal force required to move the plank when
(a) A = 750 mm,
(b) A = 900 mm.
A 1.2-m plank with a mass of 3 kg rests
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Vector Mechanics for Engineers Statics and Dynamics

ISBN: 978-0073398242

11th edition

Authors: Ferdinand Beer, E. Russell Johnston Jr., David Mazurek, Phillip Cornwell, Brian Self

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