1. The problem statement, all variables and given/known data
Consider the following two scenarios with the same box sliding up two differently inclined ramps. The coefficient of static friction is 0.7, the coefficient of kinetic friction 0.5. Eventually, the box will stop. Up to what maximum angle of the incline (in degrees) would it not slide back down?
2. Relevant equations
sin = o/h
cos= a/h
tan= o/a
3. The attempt at a solution
cos-1 (.7/.5) = error
cos-1 (.5/.7)= 44.41 = wrong
cos-1 (.4) = 66.42= wrong
cos-1 (1) = 0 so I thought it could also equal 360 so I added 360+66.42 = 426.42 = wrong
sin-1 (.7/.5)= error
sin-1 (.5/.7) =45.58 (I think its wrong)
tan-1 (.7/.5) = 54.46 = wrong
tan-1 (.5/.7)= 35.53 = scared to try to see if its wrong
HELP PLEASE !!!!!!!
Consider the following two scenarios with the same box sliding up two differently inclined ramps. The coefficient of static friction is 0.7, the coefficient of kinetic friction 0.5. Eventually, the box will stop. Up to what maximum angle of the incline (in degrees) would it not slide back down?
2. Relevant equations
sin = o/h
cos= a/h
tan= o/a
3. The attempt at a solution
cos-1 (.7/.5) = error
cos-1 (.5/.7)= 44.41 = wrong
cos-1 (.4) = 66.42= wrong
cos-1 (1) = 0 so I thought it could also equal 360 so I added 360+66.42 = 426.42 = wrong
sin-1 (.7/.5)= error
sin-1 (.5/.7) =45.58 (I think its wrong)
tan-1 (.7/.5) = 54.46 = wrong
tan-1 (.5/.7)= 35.53 = scared to try to see if its wrong
HELP PLEASE !!!!!!!
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