A 100 N force is applied to the side of a 50 kg crate resting on a level floor. If the coefficient of static friction is us = 0.25, is the 100 N force enough to make the crate accelerate?

The space between two 15-in.-long concentric cylinders is filled with glycerin (viscosity = 8.5 × 10-3 lb·s/ft2). the inner cylinder has a radius of 1 in. and the gap width between cylinders is 0.1 in. determine (a) the torque and (b) the power required to rotate the inner cylinder at 180 rev/min. the outer cylinder is fixed. assume the velocity distribution in the gap to be linear.