coefficient of kinetic friction (c) is usually smaller than the coefficient of static friction.
Work Step by Step
It takes more force to get a body in motion from rest (case 1-the coefficient of static friction), than it takes to keep a moving body in continuous motion (case 2-the coefficient of kinetic friction). From kinematics, the initial speed in case 1 is zero. Enough force must be applied to counteract friction and accelerate the body to its final speed. In case 2, the initial speed and final speeds are equal. A force to only counteract friction is to be applied here.