Home
Class 11
PHYSICS
If the road of the previous problem is h...

If the road of the previous problem is horizontal (no banking), what should be the minimum friction coefficeint so that a scooter going at 18 km/hr does not skid?

Text Solution

Verified by Experts

The correct Answer is:
B
The road is horizontal (no banking)
and `(mv^2)/R=muN`
`N=mg`
So `(mv^2)/R=mumg`

Here `v=5m/sec, R=10 m
`:. 25/10 =mug`
`rarr mu=(25/100)=0.25`
Promotional Banner

Topper's Solved these Questions

  • CIRCULAR MOTION

    HC VERMA|Exercise Objective -2|7 Videos

  • CENTRE OF MASS, LINEAR MOMENTUM, COLLISION

    HC VERMA|Exercise Exercises|64 Videos

  • FLUID MECHANICS

    HC VERMA|Exercise All Questions|96 Videos

Similar Questions

Explore conceptually related problems

In the previous problem, suppose m_2=2.0kg and m_3=3.0 kg . What should be the mass m so that it remains at rest?

A track consists of two circular pars ABC and CDE of equal radius 100 m and joined smoothly as shown in figure.Each part subtends a right angle at its centre. A cycle weighing 100 kg together with rider travels at a constant speed of 18 km/h on the track. A. Find the normal contact force by the road on the cycle when it is at B and at D. b.Find the force of friction exerted by the track on the tyres when the cycle is at B,C and D. c. Find the normal force between the road and the cycle just before and just after the cycle crosses C. d. What should be the minimum friction coefficient between the road and the tyre, which will ensure that the cyclist can move with constant speed? Take g=10 m/s^2

A car of mass 1500 kg is moving with a speed of 12.5 ms^(-1) on a circular path of radius 20 m on a level raod what should be the frictional force between the car and the raod so that the car does not slip what should be the value of the coefficent of friction to attain this force

Suppose the rod with the balls A and B of theprevious problem is clamped at the centre in such a way that it ca rotate freely about a horizontal axis through the clamp. The system is kept at rest in the horizontal position. A particle P of the same mass m is dropped from a heigh h hon the ball B. The particle collides with B and sticks to it. a. Find the angular momentum and the angular speed of the system just after the collision. b. What should be the minimum value of h so that the system makes a full rotation after the collision.

Figure shows a light rod of length l rigidly attached to a small heavy block at one end and a hook at the other end. The system is released from rest with the rod in a horizontal position. There is a fixed smooth ring at a depth h below the initial position of the hook and the hook gets into the ring as it reaches there. What should be the minimum value of h so that the block moves in a complete circle about the ring?

A staircase contains three steps each 10 cm high and 20 cm wide figure. What should be the minimum horizontal velocity of a bal rolling off the upper most plane so as to hit directly the lowest plane?

A horizontal cesium plate (phi=1.9eV) is moved vertically downward at a constant speed v in a room full of radiation of wavelength 250nm and above. What should be the minimum value of v so that the vertically upward component of velocity is nonpositive for each photoelectron?

A circular road of radius 50 m has the angel of banking equal to 30^0 . At what speed should a vehicle go on this road so that the friction is not used?

A particle of mass m is kept on the top of a smooth sphere of radius R. It is given a sharp impulse which imparts it a horizontal speed v. a. find the normal force between the sphere and the particle just after the impulse. B. What should be the minimum value of v for which the particle does not slip on the sphere? c. Assuming the velocity v to be half the minimum calculated in part, d. find the angle made by the radius through the particle with the vertical when it leaves the sphere.

HC VERMA-CIRCULAR MOTION-Exercises
  1. A scooter weighing 150 kg together with its rider moving at 36 km/hr i...

    Text Solution

    |

  2. A park has a radis of 10 m. If a vehicle goes round it at an averge sp...

    Text Solution

    |

  3. If the road of the previous problem is horizontal (no banking), what s...

    Text Solution

    |

  4. A circular road of radius 50 m has the angel of banking equal to 30^0....

    Text Solution

    |

  5. In the Bohr model of hydrogen atom, the electron is treated as a parti...

    Text Solution

    |

  6. A stone is fastened to one end of a string and is whirled in a verticl...

    Text Solution

    |

  7. A ceiling fan has a diameter (of the circle through the outer edges of...

    Text Solution

    |

  8. As mosquito is sitting on an L.P. record disc rotating on a trun tabel...

    Text Solution

    |

  9. A simple pendulum is suspended from the ceiling of a car taking a turn...

    Text Solution

    |

  10. The bob of a simple pendulum of length 1 m has mass 100g and a speed o...

    Text Solution

    |

  11. Suppose the bob of the previous problem has a speed of 1.4 m/s when th...

    Text Solution

    |

  12. Suppose the amplitude of a simple pendulum having a bob of mass m is t...

    Text Solution

    |

  13. A person stands on a spring balance at the equator. a) By what fractio...

    Text Solution

    |

  14. What is the stopping distance for a vehicle of mass m moving with spee...

    Text Solution

    |

  15. A motorcycle has to move with a consatnt speed on an overbridge which ...

    Text Solution

    |

  16. A car starts rest, on a horizontal circular road of radius R, the tang...

    Text Solution

    |

  17. A block of mass m is kept on a horizontal ruler . The friction coeffic...

    Text Solution

    |

  18. A track consists of two circular pars ABC and CDE of equal radius 100 ...

    Text Solution

    |

  19. In a children's park a heavy rod is pivoted at the centre and is made ...

    Text Solution

    |

  20. A hemispherical bowl of radius R is rotated about its axis of symmetry...

    Text Solution

    |