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A block is at rest on an inclined plane whose elevation can be varied. The coefficient...

A block is at rest on an inclined plane whose elevation can be varied. The coefficient of static friction is μs= 0.36, and the coefficient of kinetic friction is μk = 0.16. The angle of elevation θ is increased slowly from the horizontal.

At what value of θ does the block begin to slide (in degrees)?
What is the acceleration of the block?

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