Question

When the pushing force is increased to 88.2 N, the box just begins to move. What is the Friction Force if it is moving at a constant velocity? What is the coefficient of friction between the ground and box?​

Answer 1

In order to calculate frictional force look below..

The formula given by

$\\ \sf\longmapsto F_f=\mu N$

Or

$\\ \sf\longmapsto F_f=\mu mg$

u is coefficient of friction

N is normal reaction.