$3\mathrm{.}0$ kg block is on a horizontal surface with coefficient of static friction $=0\mathrm{.}20$ and

an unknown coefficient of kinetic friction. A person pushes horizontally on the block.he block is now allowed to come to rest. After coming to rest, a $6\mathrm{.}5$ N push is applied. The

surface below applies a $\_\_\_\_\_\_\_\_$ friction force of magnitude $\_\_\_\_$ Newtons