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

question 39

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. What is the frictional force while the mass is sliding?

• A) 55.4 N
• B) 107 N
• C) 49.7 N
• D) 61.2 N

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