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If a block of mass 10 kg slides down an inclined plane having an angle of...

If a block of mass 10 kg slides down an inclined plane having an angle of 30 degrees above the horizon,at the end of the inclined plane there is a frictionless surface on the end of it lies a spring having spring constant 500N/m.There is friction on the inclined plane,Find the coefficient of kinetic friction of the inclined plane.

when the block reaches the spring,it compresses it by 0.40m

Let the block start from rest and the height be 20 m
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