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Suppose the friction coefficient between...

Suppose the friction coefficient between the ground and the ladder of the previous problem is 0.540. Find the maximum weight of a mechanic who could go up and do the work from the same position of the ladder.

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The correct Answer is:
D
`mu=0.54, R_2=16g+mg, R_1=muR_2`
`rarr R_1xx10 cos 37^@=16gxx5xsin 37^@+mgxx8sin3^@`
`rarr 8R_1=48g+24/5mg`
`rarr R_2=(48g+24/5mg)/(8xx0.54)`

`rarr16g+mg=(240g+24mg)/(5x8x0.54)`
`rarr 16+m=(240+24m)/(40xx0.54)`
`rarr m=44kg`
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HC VERMA-ROTATIONAL MECHANICS-Exercises
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  2. A uniform ladder of length 10.0 m and mas 16.0 kg is resting against a...

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  3. Suppose the friction coefficient between the ground and the ladder of ...

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  13. A diver having a moment of iertia of 6.0 kg-m^2 about an axis through ...

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  14. A boy is seated in as revolving chair revolving at an angulr speed of ...

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  15. A boy is standing on a platform which is free to rotate about its axis...

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  16. A wheel of moment of inertia 0.10 kg-m^2 is rotating about a shaft at ...

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  17. A kid of mass M stands at the edge of a platform of radius R which can...

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