We have a crate of mass 38.7 kg on an inclined surface, with a coefficient of kinetic friction 0.185. Instead of pushing on the crate, you let it slide down due to gravity. What must the angle of the incline be, in order for the crate to slide with an acceleration of 7.16 m/s^2? 56.3 degrees 39.4 degrees 90.1 degrees 47.9 degrees

Question
We have a crate of mass 38.7 kg on an inclined surface, with a coefficient of kinetic friction 0.185. Instead of pushing on the crate, you let it slide down due to gravity. What must the angle of the incline be, in order for the crate to slide with an acceleration of 7.16 m/s^2?
   
56.3 degrees
   
39.4 degrees
   
90.1 degrees
   
47.9 degrees
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