Home
Class 12
PHYSICS
A rough vertical board has an accelerati...


A rough vertical board has an acceleration `a` so that a 2 kg block pressing against it dows not fall. The coefficient of friction between the block and the board should be

A

`gt g//a`

B

`lt g//a`

C

`= g//a`

D

`gt a//g`

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • LAWS OF MOTION

    VMC MODULES ENGLISH|Exercise EFFICIENT|50 Videos

  • KINEMATICS OF A PARTICLE

    VMC MODULES ENGLISH|Exercise JEE Advanced (archive)|14 Videos

  • LIQUIDS

    VMC MODULES ENGLISH|Exercise JEE ADVANCED (LEVEL -2)|55 Videos

Similar Questions

Explore conceptually related problems

A horizontal force of 10N is necessary to just hold a block stationary against as well. The coefficient of friction between the block and the wall is 0.2. The weight of the block is

A horizontal force of 10N is necessary to just hold a block stationary against as well. The coefficient of friction between the block and the wall is 0.2. The weight of the block is

Acceleration of block A varies with time as shown in figure the value of coefficient of kinetic friction between block A and B is

A block of mass M is held against a rough vertical wall by pressing it with a finger . If the coefficient of friction between the block and the wall is mu and the acceleration due to gravity is g , calculate the minimum force required to be applied by the finger to hold the block against the wall.

A block of mass M is held against a rough vertical wall by pressing it with a finger . If the coefficient of friction between the block and the wall is mu and the acceleration due to gravity is g , calculate the minimum force required to be applied by the finger to hold the block against the wall.

A block of mass m=2kg is resting on a rough inclined plane of inclination of 30^(@) as shown in figure. The coefficient of friction between the block and the plane is mu=0.5 . What minimum force F should be applied perpendicular to the plane on the block, so that blocks does not slip on the plane? (g=10m//s^(2))

In the given system, a block of mass m is resting on a board which makes an angle theta with the horizontal. What should be the minimum value of theta , so that the block just starts moving downwards? The coefficient of friction between the surfaces of the board and the block is mu .

A cart of mass M has a block of mass m in contact with it as shown in the figure-2.133. The coefficient of friction between the block and the cart is mu . What is the minimum acceleration of the cart so that the block m does not fall ?

A block of mass 10 kg is kept on a rough inclined plane as shown in the figure. A force of 3 N is applied on the block. The coefficient of static friction between the plane and the block is 0.6 What should be the minimum value of force P, such that the block doesnot move downward? (take g=10ms^(-2) )

A block of mass 10 kg is kept on a rough inclined plane as shown in the figure. A force of 3 N is applied on the block. The coefficient of static friction between the plane and the block is 0.6 What should be the minimum value of force P, such that the block doesnot move downward? (take g=10ms^(-2) )

VMC MODULES ENGLISH-LAWS OF MOTION -IMPECCABLE
  1. Coefficient of kinetic friction and coefficient of static friction bet...

    Text Solution

    |

  2. A rough vertical board has an acceleration a so that a 2 kg block pres...

    Text Solution

    |

  3. The square of resultant of two equal forces is three times their produ...

    Text Solution

    |

  4. A body of mass 60 kg suspended by means of three strings, P, Q and R a...

    Text Solution

    |

  5. Two equal forces are acting at a point with an angle of 60^(@) between...

    Text Solution

    |

  6. A body is under the action of two mutually perpendicular forces of 3 N...

    Text Solution

    |

  7. The apparent weight of a man in a lift is W(1) when lift moves upwards...

    Text Solution

    |

  8. A man slides down on a telegraphic pole with an acceleration equal to ...

    Text Solution

    |

  9. A body mass 2kg has an initial velocity of 3 metre//sec along OE and i...

    Text Solution

    |

  10. An object of mass 10kg moves at a constant speed of 10 ms^(-1). A cons...

    Text Solution

    |

  11. A block of mass M is pulled along horizontal firctionless surface by a...

    Text Solution

    |

  12. A light spring balance hangs from the hook of the other light spring b...

    Text Solution

    |

  13. A machine gun fires n bullets per second and the mass of each bullet i...

    Text Solution

    |

  14. A cracker rocket is ejecting gases at a rate of 0.05 kg/s with a veloc...

    Text Solution

    |

  15. Three block of masses m(1),m(2) and m(3) kg are placed in contact with...

    Text Solution

    |

  16. A ball hits a vertical wall horizontal at 10 m/s bounces back at 10 m/...

    Text Solution

    |

  17. A machine gun is mounted on a 200kg vehicle on a horizontal smooth roa...

    Text Solution

    |

  18. The object at rest suddenly explodes into three parts with the mass ra...

    Text Solution

    |

  19. A body of mass 50 kg is hung by a spring balance in a lift. Calculate ...

    Text Solution

    |

  20. The x and y coordinates if the particle at any time are x=5t-2t^(2) an...

    Text Solution

    |