Question

The body at rest, with weight P = 2N, connected to a dynamometer, is pulled uniformly on a horizontal surface. The dynamometer shows the force F = 1N. The coefficient of friction will be: 

 A) Zero 

 B) Equal to 2.0 

 C) Equal to 0.5 

 D) Not determined by this data

Answer 1

$F_f=\mu N \ \to\ \mu=F_f/N=1/2=0.5\ (N)$

C) Equal to 0.5 . Answer