Q.

A block of mass m slides down the plane inclined at angle 30o with an acceleration g 4. The value of coefficient of kinetic friction will be:

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a

23-12

b

32

c

123

d

23+12

answer is A.

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Detailed Solution

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Here,
mg sin30μmg cos30=maa=g123μ2g4=g2(13μ)12=13μμ=123

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A block of mass m slides down the plane inclined at angle 30o with an acceleration g 4. The value of coefficient of kinetic friction will be: