In the Figure Shown,the Coefficient of Kinetic Friction Between the Block

Multiple Choice

In the figure shown,the coefficient of kinetic friction between the block and the incline is 0.40.What is the magnitude of the acceleration of the suspended block as it falls? Disregard any pulley mass or friction in the pulley.

A) 3.4 m/s²
B) 3.7 m/s²
C) 4.2 m/s²
D) 3.9 m/s²
E) 5.4 m/s²