I need to know that what is the coefficient of kinetic friction
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Answer:
Solution is in the picture.
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Answer:
Answer is (3)
For static friction,
tan theta = coefficient of static friction.
therefore coefficient = tan 30 =1/√3=0.6
Now for kinetic friction,
s=ut+1/2at^2. (u=0)
4 =1/2*g(sintheta-coefficient*cos theta)*t^2
Solving you get 0.51 =fk
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