FIGURE 8-10 an Object of Mass M Is at Rest

Multiple Choice

FIGURE 8-10 An object of mass m is at rest on a rough inclined plane with height h, length 8 m, and which makes an angle of 30° with the horizontal. The object is allowed to move and it stops on a rough horizontal surface, at a distance of 4 m from the bottom of the inclined plane, as shown in Figure 8-10. The coefficient of kinetic friction on the inclined plane is 0.4 and g = 10 m/s².
-Refer to Figure 8-10. What is the coefficient of kinetic friction for the horizontal surface?

A) 0.1
B) 0.2
C) 0.3
D) 0.4
E) 0.6