A 60-Kg Box Slides Down an Inclined Plane That Makes an an Angle

Multiple Choice

A 6.0-kg box slides down an inclined plane that makes an angle of 39° with the horizontal.If the coefficient of kinetic friction is 0.40,at what rate does the box accelerate down the slope?

A) 3.1 m/s²
B) 3.4 m/s²
C) 3.7 m/s²
D) 4.1 m/s²