Home
Class 11
PHYSICS
A fireman of mass 60 kg slides down a po...

A fireman of mass 60 kg slides down a pole. As shown in figure. He is pressing the pole with a force of 600 N. The coefficient of friction between the hands and the pole is `0.5.` With wht acceleration will the fireman slide down `(g=10 m//s^(2))`

A

`1m//s^(2)`

B

`2.5m//s^(2)`

C

`5 m//s^(2)`

D

`10m//s^(2)`

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • FRICTION IS SOLIDS AND LIQUIDS

    TARGET PUBLICATION|Exercise MCQ (EVALUATION TEST)|21 Videos
  • FRICTION IS SOLIDS AND LIQUIDS

    TARGET PUBLICATION|Exercise MCQ (CRITICAL THINKING)|66 Videos
  • FORCE

    TARGET PUBLICATION|Exercise Evaluation Test|18 Videos
  • Gravitation

    TARGET PUBLICATION|Exercise Exercise|273 Videos

Similar Questions

Explore conceptually related problems

The coefficient of static friction between a block of mass 0.25 kg is 0.4. Calculate the force applied to it. (g = 9.8m//s^2)

Consider a car moving along a straight horizontal road with a speed of 36 km/h. If the coefficient of static friction between road and tyers is 0.4, the shortest distance in which the car can be stopped is (Take g=10 m//s2)

A block of mass m=5kg is resting on a rough horizontal surface for which the coefficient of friction is 0.2 . When a force F=40N is applied, the acceleration of the block will be (g=10m//s^(2)) .

If a force of 0.98 N is applied to a mass of 0.25 kg (g = 9.8m//s^2) the coefficient of friction is

A body of mass 2 kg is being dragged with uniform velocity of 2 m / s on a rough horizontal plane. The coefficient of friction between the body and the surface is 0.20. The amount of heat generated in 5 sec is . (4.2"joule"//cal and g=9.8 m//s^(2))

A block A with mass 100kg is resting on another block B of mass 200kg. As shown in figure a horizontal rope tied to a wall hold it. The coefficient of friction between A and B is 0.2 while coefficient of friction between B and the ground is 0.3 . the minimum required force F to start moving B will be.

A body is kept on a horizontal disc of radius 2 m at a distance of 1 m from the centre . The coefficient of friction between the body and the surface of disc is 0.4. The speed of rotation of the disc at which the body starts slipping is (g=10 m//s^2 )

A block rests on a rough inclined plane making an angle of 30^@ with the horizontal. The coefficient of static friction between the block and the plane is 0.8. If the frictional force on the block is 10N, the mass of the block (in kg) is

A block of mass m=2kg is resting on a rough inclined plane of inclination plane of inclination 30^(@) as shown in figure. The coefficient of friction between the block and the plane is mu=0.5 . What minimum force F should be applied perpendicular to the plane on the block, so that blocks does not slip on the plane? (g=10m//s^(2))

A wooden box lying at rest on an inclined surface of a wet wood is held at static equilibrium by a constant force vec F applied perpendicular to the incline. If the mass of the box is 1 kg, the angle of inclination is 30^(@) and the coefficient of static friction between the box and the inclined plane is 0.2, the minimum magnitude of vecF is (Use g= 10m//s^(2))

TARGET PUBLICATION-FRICTION IS SOLIDS AND LIQUIDS -MCQ (COMPETITIVE THINKING)
  1. A plank with a box on it at one end is gradully raised about the other...

    Text Solution

    |

  2. There is a small hole at the bottom of tank filled with water. If tota...

    Text Solution

    |

  3. The working of venturimeter is based on

    Text Solution

    |

  4. In dimension of circal velocity v(0) liquid following through a take a...

    Text Solution

    |

  5. The upper half of an inclined plane with inclination phi is perfectly ...

    Text Solution

    |

  6. A bullet of mass 50 g moving horizontally with a velocity 210 ms^(-1) ...

    Text Solution

    |

  7. A body of weight 64 N is pushed with just enough force to start it mov...

    Text Solution

    |

  8. The three vessels shown in figure have same base area. Equal volumes o...

    Text Solution

    |

  9. A fireman of mass 60 kg slides down a pole. As shown in figure. He is ...

    Text Solution

    |

  10. A tank is filled with water up to a height H. Water is allowed to come...

    Text Solution

    |

  11. A point particle of mass m, moves long the uniformly rough track PQR a...

    Text Solution

    |

  12. A 60 kg weight is dragged on a horizontal surface by a rope upto 2 met...

    Text Solution

    |

  13. When a body is moving on a surface, the force of friction is called

    Text Solution

    |

  14. The speed of the wind passing over the wings of a small aeroplane is 7...

    Text Solution

    |

  15. A rectangular vessel when full of water takes 10 minutes to be emptied...

    Text Solution

    |

  16. A vessel completely filled with water has holes 'A' and 'B' at depths ...

    Text Solution

    |

  17. A large open tank has two holes in the wall. One is a square hole of s...

    Text Solution

    |

  18. A body of mass 2 kg is being dragged with uniform velocity of 2 m / s ...

    Text Solution

    |

  19. A spherical solild of volume V is made of a material of density rho(1)...

    Text Solution

    |

  20. The heart of a man pumps 5 liters of blood through the arteries per mi...

    Text Solution

    |