A 54-Kg Mass, Placed on a Smooth Incline and Released, Begins

Multiple Choice

A 5.4-kg mass, placed on a smooth incline and released, begins to slide down the incline. The acceleration of the mass along the incline is 7.1 m/s $2$ . The angle of the incline (relative to the horizontal) is

A) 41°.
B) 46°.
C) 38°.
D) 36°.