A 120-Kg Mass Is Placed on a 25

Multiple Choice

A 12.0-kg mass is placed on a 25.0° incline and friction keeps it from sliding.The coefficient of static friction in this case is 0.580 and the coefficient of sliding friction is 0.520.The mass is given a shove causing it to slide down the incline.Taking down the incline as positive,what is the acceleration of the mass while it is sliding?

A) −1.99 m/s²
B) 1.99 m/s²
C) −0.477 m/s²
D) 0.477 m/s²