NP-3 A box of mass 8 kg rests on a ramp. The end of the ramp is slowly lifted to an angle of 30 degrees, at which point the box starts to slide. a) Draw a free-body diagram for the box on the ramp. b) Given that the box doesn't begin sliding until the ramp reaches an incline of 25 degrees, determine the coefficient of static friction hetween the box and ramp.

NP-3 A box of mass 8 kg rests on a ramp. The end of the ramp is slowly lifted to an angle of 30 degrees, at which point the box starts to slide. a) Draw a free-body diagram for the box on the ramp. b) Given that the box doesn't begin sliding until the ramp reaches an incline of 25 degrees, determine the coefficient of static friction hetween the box and ramp.