Question

The maximum applied force that can be applied to an 8.0 kg steel slider before it starts moving along a horizontal steel rail is 31 N [forward]. What is the coefficient of static friction?

Answer 1

Applied force = Frictional force

$F= \mu_s mg \\ \mu_s = \frac{F}{mg} \\ = \frac{31}{8.0 \times 9.8} \\ = 0.3954$