Home
Class 11
PHYSICS
A light thread is wrapped tightly a few ...


A light thread is wrapped tightly a few turns around a disc P of mass M. One end of the thread is fixed to the ceiling at B. The other end of the thread is passed over a mass less pulley (Q) and carries a block of mass M. All segment of the thread (apart from that on the pulley and disc) are vertical when the system is released. Find the acceleration of block A. On which object – the block A or the ceiling at B – does the thread exert more force ?

Text Solution

Verified by Experts

The correct Answer is:
`(4g)/(11)`; Thread exerts more force on A
Promotional Banner

Topper's Solved these Questions

  • NEWTONS LAWS OF MOTION

    ARIHANT|Exercise All Questions|111 Videos

  • SIMPLE HARMONIC MOTION

    ARIHANT|Exercise Level 3|9 Videos

Similar Questions

Explore conceptually related problems

A light thread has been tightly wrapped around a disc of mass M and radius R. The disc has been placed on a smooth table, lying flat as shown. The other end of the string has been attached to a mass m as shown. The system is released from rest. If m = M , which point of the disc will have zero acceleration, immediately after the system is released?

A mass less string is wrapped around a uniform disc of mass m and radius r . The string passes over a mass less pulley and is tied to a block of mass M at its other end (see figure). The system is released from rest. Assume that the string does not slip with respect to the disc. (a) Find the acceleration of the block for the case M = m (b) Find (M)/(m) for which the block can accelerate upwards.

A block A of mass 7 kg is placed on a frictionless table. A thread tied to it passes over a frictionless pulley and carries a body B of mass 3 kg at the other end. The acceleration of the system is (given g=10ms^(-2) )

A pulley fixed to the ceiling carries a string with blocks of mass m and 3m attached to its ends. The masses of string and pulley are negligible .When the system is released, its center of mass moves with what acceleration

A uniform cylinder of mass m rests on two rough horizontal planks. A thread is wound on the cylinder. The hanging end of the thread is pulled vertically down with a constant force F

A pulley fixed to the ceiling carries a thread with bodies of masses m_1 and m_2 attached to its ends. The masses of the pulley and the thread are negligible, friction is absent. Find the acceleration w_C of the centre of inertia of this system.

A light non-stretchable thread is wound on a massive fixed pulley of radius R. A small body of mass m is tied to the free end of the thread. At a moment t=0 the system is released and starts moving. Find its angular momentum relative to the pulley axle as a funciton of time t.

In the figure, the massless and inextensible thread does not slip on the pulley. It is wound over pulley as shown. If the system is released from rest,

In the figure shown a thin light inextensible string is wrapped around a uniform disc. One end of the strin is fixed to the ceiling of the lift and the other end is fied to the circumference of the disc. Acceleration 'a' of the lift is such that the centre of the disc not move with respect to ground. Find the value of (a)/(g) . String does not slip on pulley.

ARIHANT-ROTATIONAL MOTION-PHYSICS
  1. A rod of mass M = 5kg and length L = 1.5 m is held vertical on a table...

    Text Solution

    |

  2. (a) In the system shown in figure 1, the uniform rod of length L and m...

    Text Solution

    |

  3. A light thread is wrapped tightly a few turns around a disc P of mass ...

    Text Solution

    |

  4. An equilateral triangle is made from three mass less rods, each of len...

    Text Solution

    |

  5. A uniform rod of mass M and length L is hinged at its end. The rod is ...

    Text Solution

    |

  6. A disc is free to rotate about an axis passing through its centre and ...

    Text Solution

    |

  7. A uniform rod of mass M and length L is hinged at its lower end on a t...

    Text Solution

    |

  8. A ring of mass M and radius R is held at rest on a rough horizontal su...

    Text Solution

    |

  9. A uniform semicircular wire is hinged at ‘A’ so that it can rotate fre...

    Text Solution

    |

  10. A uniform solid hemisphere A of mass M radius R is joined with a thin ...

    Text Solution

    |

  11. In the arrangement shown, the double pulley has a mass M and the two m...

    Text Solution

    |

  12. A thread is tightly wrapped on two pulleys as shown in figure. Both th...

    Text Solution

    |

  13. A point mass m = 1 kg is attached to a point P on the circumference of...

    Text Solution

    |

  14. A light thread has been tightly wrapped around a disc of mass M and ra...

    Text Solution

    |

  15. A spool has the shape shown in figure. Radii of inner and outer cylind...

    Text Solution

    |

  16. A heavy uniform log of mass M is pulled up an incline surface with the...

    Text Solution

    |

  17. In the figure shown, the light thread is tightly wrapped on the cylind...

    Text Solution

    |

  18. A disc of radius r = 0.1 m is rolled from a point A on a track as show...

    Text Solution

    |

  19. A trough has two identical inclined segments and a horizontal segment....

    Text Solution

    |

  20. A uniform cylinder is lying on a rough sheet of paper as shown in fig....

    Text Solution

    |