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 of 3 kg and 4 kg are connected at the two ends of a light inextensible string that passes over a frictionless pulley. Find the acceleration of the masses and the tension in the string, when the masses are released.

Two masses 2 kg and 4 kg are connected at the two ends of light inextensible string passing over a frictionless pulley. If the masses are released, then find the acceleration of the masses and the tension in the string.

Two masses 2 kg and 4 kg are connected at two ends of light inextensible string passing over a frictionless pulley . If the masses are released , then find the accelaration of the masses and the tension in the string .

Two small spheres of mass 5kg and 15kg are joined by a rod of length 0.5m and of negligible mass. The M.I. of the system about an axis passing through centre of rod and normal to it is

A ring of mass m and radius a is connected to an inextensible string which passes over a frictionless pulley. The other end of string is connected to upper end of a massless spring of spring constant k. The lower end of the spring is fixed. The ring can rotate in the vertical plane about hinge without any friction. If horizontal position of ring is equilibrium position then find time period of small in oscillations of the ring.

Two small balls A and B of mass M and 3M hang from the ceiling by strings of equal length. The ball A is drawn aside, so that it is raised to a height H. It is then releases and collides with ball B. Select the correct answer (s)

Find the radius of gyration of a circular ring of radius r about a line perpendicular to the plane of the ring and passing through one of this particles.

A ball does not pass through a copper ring at room temperature. The same ball, after heating, passes through the same ring. It shows due to heating, the ball

Two small balls A and B, each of mass m, are joined rigidly at the ends of a light rof of length L. they are placed on a frictionless horizontal surface another ball of mass 2 m moving with speed u towards one of the ball and perpendicular to the length of the rod on the horizontal frictionless surface as shown int he figure. if the coefficient of restitution is 1/2 then the angular speed of the rod after the collision will be

A ball of mass 0.6 kg attached to a light inextensible string rotates in a vertical circle of radius 0.75 m such that it has speed of 5 ms^(-1) when the string is horizontal. Tension in the string when it is horizontal on other side is (g = 10 ms^(-2)) .

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

    |