A horizontal 52-N force must be exerted for a box to slide across ...

[mikaylakyoung]

A horizontal 52-N force must be exerted for a box to slide across a flat surface at a constant velocity of 3.5 m/s. What is the coefficient of kinetic friction between the box and the floor?
 
  A) 0.11
  B) 0.09
  C) 0.10
  D) 0.13

Question 2

The coefficients of static and kinetic friction between a 3.0-kg box and a horizontal desktop are 0.40 and 0.30, respectively. What is the force of friction on the box when a 15-N horizontal push is applied to the box?
 
  A) 4.5 N B) 6.0 N C) 15 N D) 8.8 N E) 12 N

[hugthug12]

Answer to Question 1

A

Answer to Question 2

D