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Q.

A block of mass m is placed on a surface with a vertical cross section given by y = x3/6. If the coefficient of friction is 0.5, the maximum height above the ground at which the block can be placed without slipping is

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a

12m

b

16m

c

23m

d

13m

answer is B.

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Detailed Solution

At the instant of just sliding μ = tanθ
0.5=dydx=x22⇒x=±1

H=’y’ at x=1=16m

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