# A 4.770 kg block of wood rests on a steel desk. The coefficient of static friction…

A 4.770 kg block of wood rests on a steel desk. The coefficient of

static friction between the block and the desk is ?s = 0.655 and

the coefficient of kinetic friction is ?k = 0.155. At time t = 0, a

force F = 18.8 N is applied horizontally to the block. State the

force of friction applied to the block by the table at the

following times: t=o and t>0

Consider the same situation, but this time the external force F is

38.0 N. Again state the force of friction acting on the block at

the following times: t=0 and t>0