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Statement of a problem № 3126

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A block of mass of 2 kg slides on an inclined plane that makes an angle of 30 with the horizontal. The coefficient of friction between the block and the surface is sqrt(3)/2. (a) What force should be applied to the block so that it moves down without any acceleration? (b) What force should be applied to the block so that it moves up without any acceleration?

Solution:
A block of mass of 2 kg slides on an inclined plane that makes an angle of 30 wi

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