A crate slides across a floor for before coming to rest from its original position.

What is the coefficient of kinetic friction on the crate?

Susan is trying to push a crate across the floor. She observes that the force of friction between the crate and the floor is . What is the coefficient of static friction?

Mary is trying to push a crate across the floor. She observes that the coefficient of static friction between the floor and the crate is equal to . What will be the force of friction on the crate?

It takes of force to move a block from rest. Assuming no outside forces act upon the block, what is the coefficient of static friction?

Erin pushes a cabinet across the floor. If it requires of force, what is the coefficient of kinetic friction?

Which of the following cannot be true of an object on a given surface?