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F13–2. If motor M exerts a force of F = (10r + 100) N on
the cable, where t is in seconds, determine the velocity of the
25-kg crate when i = 4 s. The coefficients of static and
kinetic friction between the crate and the plane are µ, = 0.3
%3D
and uz = 0.25, respectively. The crate is initially at rest.
м

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