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A wooden block is kept n a polished wode...

A wooden block is kept n a polished woden plank and the inclination of the plank is gradually increased. It is found that the block starts slipping when the pland makes an angle of `18^@` with the horizontal. However, once started the block can continue with uniform speed if the inclination is reduced to `15^@`. Find the coefficients of static and kinetic friction between the block and the plank.

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The coefficient of static friction
`mu_s=tan18^0`
and the coefficient of kinetic friction is
`mu_k=tan 15^0`
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HC VERMA-FRICTION-Exercises
  1. A wooden block is kept n a polished woden plank and the inclination of...

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  2. A body slipping on a rough horizontal plane moves wioth a deceleationo...

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  3. A block is projected along a rough horizontal road with a speed of 10 ...

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  4. A block of mass m is kept on a horizontal table. If the static frictio...

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  5. A block slides down an inclined surface of inclination 30^0 with the h...

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  6. Suppose the block of the previous problem is pushed down the incine wi...

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  7. A body of mass 2 kg is lyign on rough inclined plane of inclination 3...

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  8. A body of mass 2 kg is lyign on rough inclined plane of inclination 3...

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  9. In a children park an inclined plane is constructede with an angle of ...

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  10. A body starts slipping down an incline and moves half meter in half se...

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  11. The angle between the resultant contact force and the normal force exe...

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  12. Consider the situation shown in figure. Calculate a. the acceleration ...

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  13. If the tension in the string in the figure. Is N and the acceleration ...

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  14. The friction coefficient between the table and the block shown in figu...

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  15. The friction coefficient between a road and the tyre of a vehicle is 4...

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  16. The friction coefficient bettween an athelete's shoes nd the ground is...

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  17. A car is going at a speed of 21.6 km/hr when it encounters a 12.8 m lo...

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  18. A car starts from rest on a half kilometer long bridge. The coefficiet...

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  19. Figure shows tow blocks in contact sliding down an inclined surface of...

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  20. Two masses M1 and M2 are connected by a light rod and the system is sl...

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  21. A block of mass M is kept on as rough horizontal surface. The coeffici...

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