Home
Class 11
PHYSICS
A man holds a book weighing 10 N between...

A man holds a book weighing 10 N between hands and keeps it free from falling by pressing both hands against the book with a force of 25 N each. The coefficient of friction between the book and hand would be

A

0.1

B

0.2

C

0.4

D

0.6

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • Centre of mass

    MODERN PUBLICATION|Exercise Exercise|30 Videos

  • Dynamics of Circular Motion

    MODERN PUBLICATION|Exercise Exercise|81 Videos

Similar Questions

Explore conceptually related problems

A 1 kg block situated on a rough incline is connected to a spring of spring constant 100N m^-1 as shown in Fig. 6.17. The block is released from rest with the spring in the unstretched position. The block moves 10 cm down the incline before coming to rest. Find the coefficient of friction between the block and the incline. Assume that the spring has a negligible mass and the pulley is frictionless.

A block f mass M is held against a rough vertical wall by pressing it with a finger. If the coefficient of friction between the block and the wall is mu and the acceleration due to gravity is g. calculate the minimum force required to be applied by the finger to hold the block against the wall?

A block of mass 1 kg is pushed up a surface inclined to horizontal at ang angle of 30^@ by a force of 10 N parallel to the inclined surface in the figure. shows . The coefficient of friction between bock and the incline is 0.1. If the block is pushed up by 10 m along the incline, calculate work done against force of friction

Two bodies A and B of masses 5 kg and 10 kg in contact with each other rest on a table against a rigid wall (Fig. 5.21). The coefficient of friction between the bodies and the table is 0.15. A force of 200 N is applied horizontally to A. What are :- the reaction of the partition.

A block of mass 1 kg is pushed up a surface inclined to horizontal at ang angle of 30^@ by a force of 10 N parallel to the inclined surface in the figure. shows . The coefficient of friction between bock and the incline is 0.1. If the block is pushed up by 10 m along the incline, calculate work done against gravity

A block of mass 1 kg is pushed up a surface inclined to horizontal at ang angle of 30^@ by a force of 10 N parallel to the inclined surface in the figure. shows . The coefficient of friction between bock and the incline is 0.1. If the block is pushed up by 10 m along the incline, calculate work done by applied force.

A block of mass 1 kg is pushed up a surface inclined to horizontal at ang angle of 30^@ by a force of 10 N parallel to the inclined surface in the figure. shows . The coefficient of friction between bock and the incline is 0.1. If the block is pushed up by 10 m along the incline, calculate increase in potential energy

A man stands on a rotating platform, with his arms stretched horizontally holding a 5 kg weight in each hand. The angular speed of the platform is 30 revolutions per minute. The man then brings his arms close to his body with the distance of each weight from the axis changing from 90cm to 20cm. The moment of inertia of the man together with the platform may be taken to be constant and equal to 7.6 kg m^2 :- What is his new angular speed? (Neglect friction.)

Two electrons have bene removed from each atom. Find the distance between two such atoms, if they repel each other with a fore of 8.8 xx 10^-9N , when placed in free space.

The distance between two equal balls having unlike charges is 2cm. The radii of the balls are much less than the distance between them. The balls attract each other with a force of 36xx10^(-5) N. After the ball have been connected by a wire and latter has been removed, the balls repel each other with a force of 20. 25xx10^(-5)N. Determine the original charges on the balls

MODERN PUBLICATION-Competitive Exam Question-Exercise
  1. Brakes of very small contact area are not used although friction is in...

    Text Solution

    |

  2. Decrease of which one of the following quantiities enables us to trans...

    Text Solution

    |

  3. Which of the following surface in contact has maximum coefficient of f...

    Text Solution

    |

  4. Proper inflation of tyres saves fuel. this is because:

    Text Solution

    |

  5. Why are tyres made circular?

    Text Solution

    |

  6. When walkin on ice,is it better to take short or long steps?Explain.

    Text Solution

    |

  7. A body begins to slide over the surface of another, when pulled with a...

    Text Solution

    |

  8. A body of mass 10 kg is sliding down a rough inclined plane which mak...

    Text Solution

    |

  9. A man holds a book weighing 10 N between hands and keeps it free from ...

    Text Solution

    |

  10. A fireman ofof mass 60 kg is holding a vertical pole. The coefficient ...

    Text Solution

    |

  11. When milk is churned, cream separates out because of the

    Text Solution

    |

  12. A particle is taken round a circle by the application of force. The wo...

    Text Solution

    |

  13. Certain neutron stars (extremely dense stars) are believed to be rotat...

    Text Solution

    |

  14. Two particles of equal masses are revolving in circular paths of radii...

    Text Solution

    |

  15. The ratio of the linear velocities of points at distance r and r//4 fr...

    Text Solution

    |

  16. A car is taking a sudden turn to the left. A passenger in the front se...

    Text Solution

    |

  17. Two cars of unequal masses are having similar tyres. If they are movin...

    Text Solution

    |

  18. In order to stop a car in shortest distance on a horizontal road, one ...

    Text Solution

    |

  19. The maximum speed that can be achieved without skidding by a car on a ...

    Text Solution

    |

  20. An automobile is moving on a horizontal road with a speed v. If the co...

    Text Solution

    |