Answer to Question #297479 in Physics for Jai

Question

A 3.5-kg computer printer is pushed at a constant velocity across a desk with a horizontal force. The coefficient of kinetic friction between the printer and the desk is 0.36.

a) Calculate the magnitude of the normal force acting on the printer.

b) Calculate the magnitude of the kinetic friction acting on the printer.

Answer 1

Given:

$m=3.5\:\rm kg$

$\mu=0.36$

a) Calculate the magnitude of the normal force acting on the printer.

$$N=mg=\rm 3.5\:kg*9.8\: N/kg=34.3\: N$$

b) Calculate the magnitude of the kinetic friction acting on the printer.

$$F_f=\mu N=0.36*34.3\:\rm N=12.3\: N$$