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

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