Home
Class 12
PHYSICS
Two very small balls A and B of masses 4...

Two very small balls `A` and `B` of masses `4.0kg` and `5.0kg` are affixed to the ends of a light inextensible cord that passes through a frictionless ring of radius negligible compared to the length of the cord. The ring is fixed at some height above the ground . Ball `A` is pulled aside and given a horizontal velocity so that it stars moving on a circular path parallel to the ground, keeping ball `B` in euilibrium as shown. speed of the ball `A` is closest to

A

`2.5m//s`

B

`3.0m//s`

C

`4.0m//s`

D

More information is required to decide.

Text Solution

Verified by Experts

The correct Answer is:
B
`Tcostheta=m_(A)g` and `T=m_(B)grArrtheta=37^(@)`
and `(m_(A)v_(A)^(2))/(r-2sintheta)=TsinthetarArrv_(A)=3m//s`
Promotional Banner

Topper's Solved these Questions

Similar Questions

Explore conceptually related problems

Two masses 8 kg and 12 kg are connected at the two ends of a light inextensible string that goes over a frictionless pulley. Find the acceleration of the masses, and the tension in the string when the masses are released.

Two masses 8 kg and 12 kg are connected at the two ends of a light inextensible string that goes over a frictionless pulley. Find the acceleration of the masses and the tension in the string when the masses are released.

Two blocks of masses 2.0 kg and 3.0 kg are connected by light inextensible string. The string passes ove an ideal pulley pivoted to a fixed axel on a smooth incline place as shown in the figure. When the blocks are released, find magnitude of their accelerations.

A ball is dropped from a height h above ground. Neglect the air resistance, its velocity (v) varies with its height (y) above the ground as :-

Two particles of masses m and M(Mgtm) are connected by a cord that passes over a massless, frictionless pulley. The tension T in the string and the acceleration a of the particles is

Two masses m_(1) = 4.8 kg and m_(2) = 5 kg tied to a string are hanging over a light frictionless pully. What is the acceleration of masses when they are free to move ?

Two blocks of masses 5kg and 2kg are connected by a spring of negligible mass and placed on a frictionless horizontal surface. An impulse provides a velocity of 7m/s to the heavier block in the direction of the lighter block. The velocity of the centre of mass is :-

Two blocks of masses 10 kg and 4 kg are connected by a spring of negligible mass and placed on a frictionless horizontal surface. An impulse gives a velocity of 14 m//s to the heavier block in the direction of the lighter block. The velocity of the centre of mass is

Two masses of 1 kg and 5 kg are attached to the ends of a massless string passing over a pulley of negligible weight. The pulley itselt is attached to a light spring balance as shown in figure. The masses start moving during this interval, the readcing of spring balance will be-

A small ball of mass m and charge q is attached to the bottom end of a piece of negligible mass thread of length l, whose top end is fixed. The system formed by the thread and ball is in vertical plane and is in uniform horizontal magnetic field B, which is perpendicular to the plane of figure and points into the paper The ball is started with a velocity v_(0) from lower most point of circle in a direction perpendicular both to the magnetic induction and to direction of thread. The ball moves along a circular path such that thread remains tight during the whole motion. Neglect any loss of enery. Choose CORRECT statement

ALLEN -TEST PAPER-Exercise (Physics)
  1. A simple pendulum of bob of mass m and length L has one of its ends fi...

    Text Solution

    |

  2. A small disc can slide in a circular path on a frictionless inclined p...

    Text Solution

    |

  3. Two very small balls A and B of masses 4.0kg and 5.0kg are affixed to ...

    Text Solution

    |

  4. A particle is moving with a velocity of vec(v)=(3hat(i)+4that(j))m//s....

    Text Solution

    |

  5. A particle of mass m oscillates inside a smooth spherical shell of rad...

    Text Solution

    |

  6. An object of mass m is released from rest at a height h above the surf...

    Text Solution

    |

  7. As shown in figure, the left block rests on a table at distance l from...

    Text Solution

    |

  8. The following curve represents a function y=f(x). Find average value o...

    Text Solution

    |

  9. Two students A & B carried out an experiment to measure the time perio...

    Text Solution

    |

  10. A car leaves Kota for Bundi every 12 minutes The distance between Kota...

    Text Solution

    |

  11. Consider following speed time graphs describing motion of two bodies A...

    Text Solution

    |

  12. A projectile takes off with an initial velocity of 50m//s at an angle ...

    Text Solution

    |

  13. A ball is thrown from the top of a 60m high tower with velocity 20sqrt...

    Text Solution

    |

  14. Two particle are moing along X and Y axes towards the origin with cons...

    Text Solution

    |

  15. If system is in equilibrium then find relation between m(1) and m(2)

    Text Solution

    |

  16. The childern are trying to shoot a marble into a marble into a small b...

    Text Solution

    |

  17. A bead slides on a frictoinless strainght rod fixed between points A a...

    Text Solution

    |

  18. The hour hand of a clock is 6 cm long. The magnitude of the displaceme...

    Text Solution

    |

  19. A particle (bob) of mass 1 kg is performing vertical cicular motion. T...

    Text Solution

    |

  20. In case of an ideal spring, we take the reference point (where potenti...

    Text Solution

    |