1. The problem statement, all variables and given/known data A 3-lb horizontal force is applied to a 10-lb block on a rough horizontal surface. The block is initially at rest. If [itex]\mu[/itex]s is 0.5 and the [itex]\mu[/itex]k is 0.4, the frictional force on the block is? 2. Relevant equations FN=mg Fk=[itex]\mu[/itex]kFN Fs,max=[itex]\mu[/itex]sFN 3. The attempt at a solution I found [itex]\mu[/itex]s,max required to move the 10-lb block was 49.0 lb/ms^2..or approximately 22N. Since the force being applied is 3-lb, or approximately 1.4N, then the frictional force must be equal to the force being applied correct? Thanks.