A 120-Kg Mass Is Placed on a 25 $\degree$ Incline and Friction Keeps It from Sliding

question 73

Multiple Choice

A 12.0-kg mass is placed on a 25.0 $\degree$ 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"

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