Home
Class 11
PHYSICS
A block A of mass 2 kg rests on another ...

A block A of mass 2 kg rests on another block B of mass 8 kg which rests on a horizontal floor . The coefficient of friction between A and B is `0.2` while that between B and floor is `0.5` . When horizontal force F = 25 N is applied on the block B , the force of friction between A and B is (in N) .

Text Solution

Verified by Experts

The correct Answer is:
0
As there is no relative slipping between A and B .
as `" " f_(L) = mu N = (5)/(10) xx 100 = 50 N " " [F lt f_(L)]`
Promotional Banner

Topper's Solved these Questions

  • FRICTION AND CIRCULAR MOTION

    GRB PUBLICATION|Exercise Comprehension type|11 Videos

  • FRICTION AND CIRCULAR MOTION

    GRB PUBLICATION|Exercise Matrix - Match|5 Videos

  • FORCE AND NEWTONS LAWS OF MOTION

    GRB PUBLICATION|Exercise Comprehension|12 Videos

  • MOTION IN A STRAIGHT LINE

    GRB PUBLICATION|Exercise Comprehension type Queston|14 Videos

Similar Questions

Explore conceptually related problems

A block A of mass 2 kg rests on another block B of mass 8 kg which rests on a horizontal floor. The coefficient of friction between A and B is 0.2 while that between B and floor is 0.5 .When a horizontal floor F of 25 N is applied on the block B the force of friction between A and B is

A block A of mass 2 kg rests on another block B of mass 8 kg which rests on a horizontal floor. The coefficient of friction between A and B is 0.2 while that between B and floor is 0.5. when a horizontal force of 25 N is applied on the block B. the force of friction between A and B is

A block A of mass 200 kg rest on a block B of mass 300 kg . A is tied with a horizontal string to a wall. Coefficient of friction between A and B is 0.25 and that between B and floor is 0.2 . The horizontal force F needed to move the block B is

A block A of mass 2 kg is placed over smooth block B of mass 4 kg which is placed over a smooth horizontal floor The coefficient of friction between A and B is 0.4 when a horizontal forces of magnitude 10 N is applied on A the acceleration of block of A and B are

A block of mass 2 kg is at rest on a floor . The coefficient of static friction between block and the floor is 0.54. A horizonatl force of 2.8 N is applied to the block . What should be the frictional force between the block and the floor ? ( take , g = 10 m//s^(2) )

A small block of mass 20kg rests on a bigger block of mass 30kg , which lies on a smooth horizontal plane. Initially the whole system is at rest. The coefficient of friction between the blocks is 0.5 . The horizontal force F=50N is applied on the lower block. a. Find the work done by fricitonal force on upper block and on the lower block in t=2s . b. Is the magnitude of work done by the frictional force on upper and lower blocks same? c. Is the work done by the frictional force on the upper block converted to heat or mechanical energy or both?

A block A of mass m kg lies on a block B of mass m kg. B in turn lies on smooth horizontal plane. The coefficient of friction between A and B is mu . Both the blocks are initially at rest. A horizontal force F is applied to lower block B at t = 0 till the lower block B undergoes a displacement of magnitude L. Match the statements in Table-1 with the results in Table-2.

GRB PUBLICATION-FRICTION AND CIRCULAR MOTION -Integer answer
  1. Two blocks A and B of mass 2 kg and 4 kg are placed one over the other...

    Text Solution

    |

  2. Calculate F such that frictional force acting on all blocks zero.

    Text Solution

    |

  3. Two small block m=2kg each kept on wedge of mass 12 kg. There is no fr...

    Text Solution

    |

  4. A 20 kg block is originally at rest on a horizontal surface for which ...

    Text Solution

    |

  5. Block B is placed on a smooth surface. Block A is placed on rough surf...

    Text Solution

    |

  6. mu is coefficient of friction between all surfaces . Block A is kept o...

    Text Solution

    |

  7. A toy car of mass m can travel at a fixed speed. It moves in circle on...

    Text Solution

    |

  8. A large mass M and a small mass m hang at two ends of a string that pa...

    Text Solution

    |

  9. A closed chain A of mass m = 0.36kg is attached to a vertical rotating...

    Text Solution

    |

  10. A table with smooth horizontal surface is placed in a cabin which move...

    Text Solution

    |

  11. A solid body starts rotating about a stationary axis with an angular a...

    Text Solution

    |

  12. A 20 kg block is originally at rest on a horizontal surface for which ...

    Text Solution

    |

  13. Block A and B are connected by a rod of negligible mass as shown in Fi...

    Text Solution

    |

  14. A 6 kg blocks is kept over a rough surface with coefficients of fricti...

    Text Solution

    |

  15. Two blocks A and B of mass 2 kg and 4 kg are placed one over the other...

    Text Solution

    |

  16. Two blocks of masses M(1) and M(2) connected by a light spring rest on...

    Text Solution

    |

  17. Two blocks A and B of mass 2 kg and 4 kg are placed one over the other...

    Text Solution

    |

  18. A block A of mass 2 kg rests on another block B of mass 8 kg which res...

    Text Solution

    |

  19. Coefficient of friction between two blocks shown in Fig. 7.203 is mu ...

    Text Solution

    |

  20. A block is moving on an inclined plane making an angle 45^(@) with the...

    Text Solution

    |