Home
Class 12
PHYSICS
A block of mass m is placed on a smooth ...

A block of mass m is placed on a smooth horizontal floor is attached to one end of spring. The other end of the spring is attached to fixed support. When spring is vertical it is relaxed. Now the block is pulled to wards right by a force F, which is being increased gradually. When the speing makes angle `53^(@)` with the vertical, block leaves the floor.

When blocks leaves the table, the normal force on it from table is

A

mg

B

zero

C

`(4mg)/(3)`

D

`(3mg)/(4)`

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • NEWTON'S LAWS OF MOTION & FRICTION

    ALLEN|Exercise EXERCISE (JM)|6 Videos

  • NEWTON'S LAWS OF MOTION & FRICTION

    ALLEN|Exercise EXERCISE (JA)|4 Videos

  • NEWTON'S LAWS OF MOTION & FRICTION

    ALLEN|Exercise EXERCISE (O-1)|51 Videos

  • MOTION IN A PALNE

    ALLEN|Exercise SOLVED EXAMPLE|28 Videos

  • NEWTONS LAWS OF MOTION

    ALLEN|Exercise EXERCISE-III|28 Videos

Similar Questions

Explore conceptually related problems

A block of mass m is placed on a smooth horizontal floor is attached to one end of spring. The other end of the spring is attached to fixed support. When spring is vertical it is relaxed. Now the block is pulled to wards right by a force F, which is being increased gradually. When the speing makes angle 53^(@) with the vertical, block leaves the floor. When the block leaves the table, the force F is :-

A block of mass m is placed on a smooth horizontal floor is attached to one end of spring. The other end of the spring is attached to fixed support. When spring is vertical it is relaxed. Now the block is pulled to wards right by a force F, which is being increased gradually. When the speing makes angle 53^(@) with the vertical, block leaves the floor. Force constant of the spring is :-

A block of mass m is kept on a rough horizontal surface and is attached with a massless spring of force constant k. The minimum constant force applied on the other end of the spring of lift the block is

A block of mass m, lying on a smooth horizontal surface, is attached to a spring (of negligible mass) of spring constant k. The other end of the spring is fixed, as shown in the figure. The block is initally at rest in its equilibrium position. If now the block is pulled withe a constant force F, the maximum speed of the block is :

On a smooth inclined plane a body of mass M is attached between two springs. The other ends of the springs are fixed to firm supports. If each spring has a force constant k, the period of oscilation of the body is (assuming the spring as massless)

On a smooth inclined plane, a body of mass M is attached between two springs. The other ends of the springs are fixed to firm supports. If each spring has force constant K , the period of oscillation of the body (assuming the springs as massless) is

"A mass is attached to one end of a spring and by holding the other end in hand, the spring is whirled in a horizontal circle" What happens to the length of the spring ?

A force P acts on a smooth block of mass m placed on a horizontal floor at an angle theta with with horizontal on the block

A spring has natural length 40 cm and spring constant 500 N//m . A block of mass 1 kg is attached at one end of the spring and other end of the spring is attached to a ceiling. The block is relesed from the position, where the spring has length 45 cm .

A spring with one end attached to a mass and the other to a right support is stretched and released

ALLEN-NEWTON'S LAWS OF MOTION & FRICTION-EXERCISE (O-2)
  1. Consider a block suspended from a light string as shown in the digure....

    Text Solution

    |

  2. A block of weight 9.8N is placed on a table. The table surface exerts...

    Text Solution

    |

  3. A block of mass m is suspended from a fixed support with the help of a...

    Text Solution

    |

  4. A block A and wedge B connected through a string as shown. The wedge B...

    Text Solution

    |

  5. Two blocks A and B of mass 2 kg and 4 kg respectively are placed on a ...

    Text Solution

    |

  6. A block is kept on a rough surface and applied with a horizontal force...

    Text Solution

    |

  7. A block placed on a rough horizontal surface is pushed with a force F ...

    Text Solution

    |

  8. A block is placed over a plank. The coefficient of friction between th...

    Text Solution

    |

  9. A block is released from rest from point on a rough inclined place of ...

    Text Solution

    |

  10. In the given figure both the bocks have equal mass. When the thread is...

    Text Solution

    |

  11. A block of mass m is placed on a smooth horizontal floor is attached t...

    Text Solution

    |

  12. A block of mass m is placed on a smooth horizontal floor is attached t...

    Text Solution

    |

  13. A block of mass m is placed on a smooth horizontal floor is attached t...

    Text Solution

    |

  14. When F = 2N, the frictional force between 5 kg block and ground is

    Text Solution

    |

  15. When F = 2N, the frictional force between 10 kg block 5 kg block is

    Text Solution

    |

  16. The maximum F which will not cause motion of any of the blocks is

    Text Solution

    |

  17. The maximum acceleration of 5 of kg block is :-

    Text Solution

    |

  18. The acceleration of 10 kg block when F = 30 N is

    Text Solution

    |

  19. In the figure shown ,acceleration of 1 is x (upwards). Acceleration of...

    Text Solution

    |

  20. Velocity of there particless A.B and C varies with time t as , v(A) =(...

    Text Solution

    |