Home
Class 12
PHYSICS
A body crosses the topmost point of a ve...

A body crosses the topmost point of a vertical circle with a critical speed. Its centripetal acceleration, when the string is horizontal will be

A

6 g

B

3 g

C

2 g

D

g

Text Solution

Verified by Experts

The correct Answer is:
C
Force `F = (mv^(2))/(r ) + mg`
`rArr ma = (m(rg))/(r ) + mg`
(At topmost point `v = sqrt(rq)`)
`ma = 2mg rArr = 2g`
Promotional Banner

Topper's Solved these Questions

  • PRACTICE SET 16

    MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS|Exercise Paper -1 (Physics & Chemistry)|50 Videos

  • PRACTICE SET 18

    MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS|Exercise PAPER 1 (PHYSICS & CHEMISTRY)|50 Videos

Similar Questions

Explore conceptually related problems

A body attached at one end of a string crosses the topmost point of a vertical circle with the critical speed Its centripetal acceleration , when the string is horizontal will be

A mass attached to one end of a string crosses top - most point on a vertical circle with critical speed. Its centripetal acceleration when string becomes horizontal will be (where, g=gravitational acceleration)

A particle crosses the topmost point C of a vertical circle with critical speed , then the ratio of velocities at points A, B and C is

A body of mass 4 kg is moved in a vertical circle with sufficient speed .Its tangential acceleration , when the string makes an angle of 30^(@) with the verticle downward is (g=10 mm/s^(2))

Consider the situation as shown in the figure. The ball attached to a string is moving in the verticle circle find the (a) centripetal acceleration and (b) tanfential acceleration when the string makes an anhle 60^(@) with lower vertical. Also, express the total acceleration in vector from taking A as origin.

A body of mass 100 gram is tied at the end of a string of length 1m. It is rotated in a vertical circle at a critical speed of 4 m/s at the highest point . The tension in the string at the huighest point in its path is [ take g=10 m//s^(2) ]

A body of mass 1 kg is suspended by a string 1 m long .The body is rotate in a vertical with a constant speed of 1m//s . The tension in the steing when it is at horizontal position will be

A body is mass m is rotating in a vertical circle of radius 'r' with critical speed. The difference in its K.E at the top and at the bottom is

A stone tied to the end of a 20 cm long string is whriled in a horizontal ciecle with a constant angular speed .If the centripetal acceleration is 980 cm//s^(2) , its angular speed is .

MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-PRACTICE SET 17-PHYSICS & CHEMISTRY
  1. A charge 10 muC is placed at the centre of a hemisphere of radius R = ...

    Text Solution

    |

  2. The graph between time period (T) and length (l) of a simple pendulum ...

    Text Solution

    |

  3. A body crosses the topmost point of a vertical circle with a critical ...

    Text Solution

    |

  4. The terminal speed of a sphere of gold (density = 19.5 kg m^(-3)) is 0...

    Text Solution

    |

  5. A 20 muF capacitor is connected to 45 V battery through a circuit whos...

    Text Solution

    |

  6. A beam of light of wavelength 600 nm from a distant source falls on a ...

    Text Solution

    |

  7. The fundamental of a closed pipe is 220 Hz. If (1)/(4) of the pipe is ...

    Text Solution

    |

  8. A long elastic spring is stretched by 2 cm and its potential energy is...

    Text Solution

    |

  9. A charge of 8.0 mA in the emitter current brings a charge of 7.9 mA in...

    Text Solution

    |

  10. The intensity of radiation emitted by the sun has its maximum value at...

    Text Solution

    |

  11. The PE of a harmonic oscillator of mass 2 kg in its mean position is 4...

    Text Solution

    |

  12. When the angle of incidence is 60^(@) on the surface of a glass slab, ...

    Text Solution

    |

  13. In a surface tension experiment with a capillary tube water rises upto...

    Text Solution

    |

  14. In a travelling wave, y = 01 sin pi[x - 330t + (2)/(3)]. The phase dif...

    Text Solution

    |

  15. In an interference experiment, the spacing between successive maxima o...

    Text Solution

    |

  16. A body floats in a liquid contained in a beaker. The whole system as s...

    Text Solution

    |

  17. A lossless coaxial cable has a capacitance of 7 xx 10^(-11)F and indu...

    Text Solution

    |

  18. A hollow sphere filled with water through a small body in it is then h...

    Text Solution

    |

  19. A coil with air inside it has a self inductance of 0.05 H. A soft iro...

    Text Solution

    |

  20. A telescope, whose objective lens has an apertune of 1 mm for the wave...

    Text Solution

    |