Answer
a). coefficient of static friction =$0.8$
b). coefficient of kinetic friction =$0.57$
Work Step by Step
275N corresponds to static friction,
195N corresponds to kinetic friction.
a). coefficient of static friction $=\frac{F_{s}}{mg}=\frac{275}{35\times9.8}=0.8$
b). coefficient of kinetic friction $=\frac{F_{k}}{mg}=\frac{195}{35\times9.8}=0.57$
