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pallavi pradeep bhardwaj Grade: 12
        

A block slides down an inclined surface ofinclination 30 degree with the horizontal Starting from rest it covers 8m in the first two seconds .Find the coefficient of kinetic friction between the two

7 years ago

Answers : (1)

Badiuddin askIITians.ismu Expert
147 Points
										

Dear pallavi


Force acting along the inclination is = mgsinΘ  - μmgcosΘ


so acceleration a =(mgsinΘ  - μmgcosΘ)/m


                         =gsinΘ  - μgcosΘ


S =ut +1/2 a t2  


8=0+1/2 (gsinΘ  - μgcosΘ)*4


or 4=10*1/2  - μ*10*√3/2


  μ=1/5√3






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Badiuddin

7 years ago
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