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A 4 m long ladder weighing 25 kg rests w...

A `4 m` long ladder weighing `25 kg` rests with its upper end against a smooth wall and lower end on rough ground.What should be the minimum coefficient of friction between the ground and the ladder for it to be inclined at `60^(@)` with the horizontal without slipping? `(Take g =10 m//s^(2))`

A

0.19

B

0.29

C

0.39

D

0.49

Text Solution

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The correct Answer is:
B
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NCERT FINGERTIPS-PRACTICE PAPERS-Practice Paper 3
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  4. A vessel contains a mixtrue consisting of m(1) = 7g of nitrogen M(1) =...

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  9. Which of the following is dimensionless?

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  10. Given vecF=(4hati-10hatj)and vecr=(5hati-3hatj). then torque vectau is

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  12. In uniform circular motion

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  13. A ball is rolled off along the edge of the table (horizontal ) with ve...

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  14. Three masses of 1kg, 6 kg and 3 kg are connected to each other with th...

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  15. A liquid of density rho flows along a horizontal pipe of uniform cross...

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  16. A chain of uniform mass m and length L is held on a frictionless table...

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  17. For the same total mass, which of the following will have the largest ...

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  18. Kepler's second law is based on

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  19. A spaceship is launched into a circular orbit close to the Earth's sur...

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  21. Two blocks M1 and M2 having equal masses are to move on a horizontal f...

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