Home
Class 12
PHYSICS
A boy is sitting on the horizontal platf...

A boy is sitting on the horizontal platform of a joy wheel at a distance of 5 m from the center. The wheel begins to rotate and when angular speed exceeds 1 rad/s, the boy just slips. The coefficient of friction between the boy and the wheel is `(g=10m//s^(2))`

A

0.5

B

0.32

C

0.71

D

0.2

Text Solution

AI Generated Solution

Promotional Banner

Topper's Solved these Questions

  • LAWS OF MOTION

    AAKASH INSTITUTE|Exercise Assignment (SECTION-B)|44 Videos
  • LAWS OF MOTION

    AAKASH INSTITUTE|Exercise Assignment (SECTION-C)|63 Videos
  • LAWS OF MOTION

    AAKASH INSTITUTE|Exercise EXERCISE|70 Videos
  • KINETIC THEORY

    AAKASH INSTITUTE|Exercise EXERCISE (ASSIGNMENT) SECTION - D Assertion - Reason Type Questions|10 Videos
  • MAGNETISM AND MATTER

    AAKASH INSTITUTE|Exercise ASSIGNMENT (SECTION D)|26 Videos

Similar Questions

Explore conceptually related problems

A boy is sitting on a horizontal platform of joy wheel at a distance of 5 m from its centre .The joy wheel begins to rotate and when the angular speed exceeds 10 revolutions per minute, the boy just slip , the cofficient of friction between ( g=10m//s^(2))

A coin kept at a distance of 5 cm from the centre of a turntable of radius 1.5 m just begins to slip when the turntable rotates at a speed of 90 r.p.m. Calculate the coefficient of static friction between the coin and the turntable [g = 9.8 m//s^(2)]

A wheel of radius R=10 cm and moment of inertia I=0.05kg m^(2) is rotating about a fixed horizontal axis O with angular velocity omega_(0)=10rads^(-1) . A uniform riigid rod of mass m=3 kg and length l=50 cm is hinged at one end A such that it can rotate at end A in a vertical plane. End B of the rod is tied with a thread as shown in figure such that the rod is horizontal and is just in contact with the surface of rotating wheel. Horizontal distance between axis of rotation O of cylinder and A is equal to a = 30 cm . If the wheel stops rotating after one second after the thread has burnt, calculate coefficient of friction , mu between the rod and the surface of the wheel. (g = 10 ms^(-2))

A coin is placed at the edge of a horizontal disc rotating about a vertical axis through its axis with a uniform angular speed 2 rad s^(-1) . The radius of the disc is 50 cm. Find the minimum coefficient of friction between disc and coin so that the coin does not slip. (Take g = 10 m//s^(2) )

A boy (30 kg) sitting on his horse whips it. the horse speeds up at an average adcceleration of 2.0 m/s^2 . A. If the boy does not slide back, what is the force of friction exerted by the horse on the boy? b.If the boy slides back during the acceleration, what can be said about the coefficient of static friction between the horse and the boy. Take = 10 m/s^2

A boy of mass 50 kg jumps with horizontal velocity of 1 m/s on to a stationary cart. If mass of the cart will be [Assume friction between the wheels the cart and road is zero ]

A fly wheel rotating about a fixed axis has a kinetic energy of 360 J . When its angular speed is 30 rad s^(-1) . The moment of inertia of the wheel about the axis of rotation is

A wheel is rotating about a its own axis. The moment of inertia of the wheel about axis of rotation.If its angular speed is 30 rad/sec and its kinetic energy is 300J ( in kg-m^(2))

A boy (mass of 40 kg) is standing at one end of a boat (mass of 60 kg) in still water. The length of the boat is 10 m and the boy takes 2s to reach at other end of boat moving with constant speed. Assuming no friction between the boat and the water. (i) The distance covered by the boat is 4 m (ii) The distance covered by the boy with respect to the ground is 6 m . (iii) The velocity of the boy with respect to the ground is lt 5 m//s (iv) The velocity of the boy is 3 m//s

AAKASH INSTITUTE-LAWS OF MOTION-Assignment (SECTION-A)
  1. Which is a suitable method to decrease friction

    Text Solution

    |

  2. A cubical block rests on a plane of mu= sqrt(3) . The angle through wh...

    Text Solution

    |

  3. A block of mass 1 kg is projected from the lowest point up along the i...

    Text Solution

    |

  4. A child weighing 25 kg slides down a rope hanging from a branch of a t...

    Text Solution

    |

  5. An object of mass 1 kg moving on a horizontal surface with initial ve...

    Text Solution

    |

  6. A heavy box is slid across a rough floor with an initial speed of 4 m/...

    Text Solution

    |

  7. If a block moving up an inclined plane at 30^(@) with a velocity of 5 ...

    Text Solution

    |

  8. A chain is lying on a rough table with a fraction 1/n of its length ha...

    Text Solution

    |

  9. A block has been placed on an inclined plane with the slope angle thet...

    Text Solution

    |

  10. A horizontal force of 10N is necessary to just hold a block stationary...

    Text Solution

    |

  11. In the figure shown, the coefficient of static friction between the bl...

    Text Solution

    |

  12. Two block A and B of masses 5 kg. and 3 kg. respectively rest on smoot...

    Text Solution

    |

  13. A small metallic sphere of mass m is suspended from the ceiling of a c...

    Text Solution

    |

  14. A cystlist riding a bicycle a bicycle at a speed of 14sqrt(3) ...

    Text Solution

    |

  15. A car turns a corner on a slippery road at a constant speed of 10 m /s...

    Text Solution

    |

  16. A car is moving on a horizontal circular track of radius 0.2 km with a...

    Text Solution

    |

  17. A boy is sitting on the horizontal platform of a joy wheel at a distan...

    Text Solution

    |

  18. A vehicle is moving on a track with constant speed as shown in figure....

    Text Solution

    |

  19. A train is running at 20 m/s on a railway line with radius of curvatur...

    Text Solution

    |

  20. A car is moving on a horizontal circular road of radius 0.1 km with co...

    Text Solution

    |