Home
Class 11
PHYSICS
A block of mass 4kg is placed in contact...

A block of mass `4kg` is placed in contact with the front vertical surface of a lorry.The coefficient of friction between the vertical surface and block is `0.8`.The lorry is moving with an acceleration of `15m//s^(2)`.The force of friction between lorry and block is `(g=10ms^(-2))`

A

`48N`

B

`24N`

C

`40N`

D

Zero

Text Solution

Verified by Experts

The correct Answer is:
C
`W= mg,f=mu ma,m lt f`
Promotional Banner

Topper's Solved these Questions

  • CIRCULAR MOTION

    NARAYNA|Exercise LEVEL I(H.W)|43 Videos

  • CALORIMETRY

    NARAYNA|Exercise Level- II (H.W)|11 Videos

  • COLLISION

    NARAYNA|Exercise Level-II (H.W)|54 Videos

Similar Questions

Explore conceptually related problems

Two blocks of masses m_(1) and m_(2) are placed in contact with each other on a horizontal platform. The coefficient of friction between the platform and the two blocks is the same. The platform moves with an acceleration. The force of interaction between the blocks is :

A block of mass 1 kg is placed on a truck which accelerates with acceleration 5ms^(-2) . The coefficient of static friction between the block and truck is 0.6. The frictional force acting on the block is

A block of mass 1 kg lies on a horizontal surface in a truck. The coefficient of static friction between the block and the surface is 0.6. If the acceleration of the truck is 5m//s^2 , the frictional force acting on the block is…………newtons.

A block of mass 1kg lies on a horizontal surface in a turck, the coefficient of static fricition between the block and the surface is 0.6, what is the force of fricition on the block. If the acceleration of the truck is 5m//s^(2) .

A force F accelerates a block of mass m on horizontal surface. The coefficient of friction between the contact surface is . The acceleration of m will be -

A rectangular block of mass 5 kg is kept on a horizontal surface . The coefficient of friction between the block and the surface is 0.2 . If a force of 20 N is applied to the block at angle of 30^(@) with the horizontal plane , what is the force of friction on the block ? (Take g = 10 m//s^(2) )

A block of mass m is placed on a rough horizontal surface. If minimum force to pull the block is (mg)/(2) then coefficient of friction is :

A block of mass m=4kg is placed oner a rough inclined plane as shown in figure. The coefficient of friction between the block and the plane is mu=0.5 . A force F=10N is applied on the block at an angle of 30^(@) .

A block of mass 8 kg is sliding on a surface inclined at an angle of 45^(@) with the horizontal. Calculate the acceleration of the block. The coefficient of friction between the block and surface is 0.6. (Take g=10m//s^(2) )

Two blocks A and B of masses 10 kg and 15 kg are placed in contact with each other rest on a rough horizontal surface as shown in the figure. The coefficient of friction between the blocks and surface is 0.2. A horizontal force of 200 N is applied to block A. The acceleration of the system is ("Take g"=10ms^(-2))

NARAYNA-CIRCULAR MOTION-LEVEL II(H.W)
  1. A particle is placed at rest inside a hollow hemisphere of radius R. T...

    Text Solution

    |

  2. A horizontal force is applied on a body on a rough horizontal surface ...

    Text Solution

    |

  3. A block of mass 4kg is placed in contact with the front vertical surfa...

    Text Solution

    |

  4. A person of mass 72kg sitting on ice pushes a block of mass of 30kg on...

    Text Solution

    |

  5. Consider a 14-tyre truck, whose only rear 8 wheels are power driven (m...

    Text Solution

    |

  6. A block is sliding on a rough horizontal surface. If the contact force...

    Text Solution

    |

  7. A block is sliding on a rough horizontal surface. If the contact force...

    Text Solution

    |

  8. A block of mass 2kg is placed on the surface of trolley of mass 20kg w...

    Text Solution

    |

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

    Text Solution

    |

  10. A box is placed on the floor of a truck moving with an acceleration of...

    Text Solution

    |

  11. A block is placed at a distance of 2m from the rear on the floor of a ...

    Text Solution

    |

  12. Sand is piled up on a horizontal ground in the form of a regualr cone ...

    Text Solution

    |

  13. A body is allowed to slide from the top along a smooth inclined plane ...

    Text Solution

    |

  14. A body slides down a smooth inclined plane of height h and angle of in...

    Text Solution

    |

  15. A body is projected up along an inclined plane from the bottom with sp...

    Text Solution

    |

  16. The minimum force required to move a body up on an inclined plane is t...

    Text Solution

    |

  17. The time taken by a body to slide down a rough 45^(@) inclined plane i...

    Text Solution

    |

  18. A body is sliding down a rough inclined plane The coefficient of frict...

    Text Solution

    |

  19. A body takes 1(1)/(3) times as much time to slide down a rough incline...

    Text Solution

    |

  20. A body is sliding down an inclined plane (mu = (1)/(2)). If the normal...

    Text Solution

    |