A 75 force is applied to the side of a crate resting on a level floor. The crate has a mass of 25kg. If the coefficient of static friction is. 15, is the 75 N force enough to make the crate accelerate? Explain why or why not.

If the coefficient of static friction is 0.15, then 0.15 of the crate's weight

shows up as a force resisting the horizontal pull. So we really only

need to know the crate's weight.

Weight = (mass) x (gravity) = (25) x (9.8) = 245 newtons.

0.15 of 245 newtons = 36.75 newtons.

The force due to friction that's holding the crate back, not letting it start

sliding, is 36.75 newtons. If you push it with 75 newtons of force, then

that IS enough to make the crate accelerate.