Home
Class 12
PHYSICS
The minimum speed for a particle al the ...

The minimum speed for a particle al the lowest point of vertical circle of radius R, to describe the circle is v. If the radius of circle is reduced to one-fourth its value, the corresponding minimum speed will be

A

`v/4`

B

`v/2`

C

2 v

D

4 v

Text Solution

Verified by Experts

`R=300m`
`mu=0.3`
`g=10m//s^2`
Maximum speed
`v_(mx)=sqrt(murg)=sqrt(0.3xx30xx10)`
`30xx(18)/5=108km//hr`
Promotional Banner

Topper's Solved these Questions

  • GRAVITATION

    SIA PUBLICATION|Exercise MCQs|35 Videos

  • LAWS OF MOTION

    SIA PUBLICATION|Exercise M.C.Q|41 Videos

Similar Questions

Explore conceptually related problems

The radius of a circle is doubled then its area becomes ……………….. Times.

A diameter (d) of a circle is twice the radius (r) of the circle?

Diameter of a circle whose radius is 'r' is

The minimum speed of a bucket full of water whirled in a vertical circle of radius 10 m at the highest point so that the water may not fall is (g=10ms^(-2))

SIA PUBLICATION-KINETIC THEORY -PROBLEM ( MCQs )
  1. A car starts from rest and travels with uniform acceleration a, for so...

    Text Solution

    |

  2. The angle between two vectors 6 hati + 6 hatj- 3hatk and 7 hati + 4 ha...

    Text Solution

    |

  3. The minimum speed for a particle al the lowest point of vertical circl...

    Text Solution

    |

  4. A car is moving on a ciirular level road of curvature 300 m. If the co...

    Text Solution

    |

  5. A person throws a bottle into a dust-bin at the same height as he is 2...

    Text Solution

    |

  6. A car starts from rest, attains a velocity of 36 kmh^-1 with an accele...

    Text Solution

    |

  7. 1. A stone tied to a string is rotated in a vertical circle. The minim...

    Text Solution

    |

  8. The maximum speed with which a car can be driven touqd a curve of radi...

    Text Solution

    |

  9. For an electron circulating around the nucleus, the centripetal force ...

    Text Solution

    |

  10. A particle is moving east wards with a velocity of 15 ms^(-1). In a ti...

    Text Solution

    |

  11. The reaction time for a car driver is 0.9 s. If the car travetling ini...

    Text Solution

    |

  12. The angular velocity of the second's-hand ofa watch is

    Text Solution

    |

  13. The direction of velocity and acceleration of a projectile at the high...

    Text Solution

    |

  14. A bomb is dropped from an aircraft travelling horizontal at 150 ms^-1 ...

    Text Solution

    |

  15. The angle made by the vector vecA = veci + vecj with x-axis is

    Text Solution

    |

  16. A fan is making 600 rev/min. If it makes 1200 rev/min, what is the inc...

    Text Solution

    |

  17. The angular velocity of a rickshaw wheel is 70 rads^-1. If !he radius ...

    Text Solution

    |

  18. If a particle tied to the end of string is set in circular motion then...

    Text Solution

    |

  19. A motor cycle is travelling on a curved track of radius 500 m. If the ...

    Text Solution

    |

  20. A body is projected vertically up with speed u takes time T to reach m...

    Text Solution

    |