Home
Class 9
PHYSICS
A body of mass 25 kg is dragged on a hor...

A body of mass 25 kg is dragged on a horizontal rough road with a constant speed of `20 kmh^(-1)`. If the coefficient of friction is 0.5, find the heat generated in one hour. If 50% of the heat is absorbed by the body, find the rise in temperature. Specific heat of the material of the body is` 0.1 cal g^(-1).^(@)C^(-1).`

Promotional Banner

Topper's Solved these Questions

  • FORCE AND LAWS OF MOTION

    MODERN PUBLICATION|Exercise EXAMPLE|123 Videos

  • FLOATING BODIES

    MODERN PUBLICATION|Exercise EXERCISE|149 Videos

  • GRAVITATION

    MODERN PUBLICATION|Exercise EXAMPLE|102 Videos

Similar Questions

Explore conceptually related problems

A body of mass 2 kg initially at rest moves under the action of an applied horizontal force of 7 N on a table with coefficient of kinetic friction = 0.1. Compute the:- change in kinetic energy of the body in 10 s.

At room temperature (27.0 ^@C) the resistance of a heating element is 100Omega . What is the temperature of the element if the resistance is found to be 117Omega . given that the temperature coefficient of the material of the resistor is 1.70 xx 10^-4 ^@C^-1 .

A body of mass 2 kg initially at rest moves under the action of an applied horizontal force of 7 N on a table with coefficient of kinetic friction = 0.1. Compute the:- work done by the net force on the body in 10 s.

A body of mass 2 kg initially at rest moves under the action of an applied horizontal force of 7 N on a table with coefficient of kinetic friction = 0.1. Compute the:- work done by friction in 10 s.

A body of mass 2 kg initially at rest moves under the action of an applied horizontal force of 7 N on a table with coefficient of kinetic friction = 0.1. Compute the:- work done by the applied force in 10 s.

At room temperature (27.0^@ C) the resistance of a heating element is 100 Omega . What is the temperature of the element if the resistance is found to be 117 Omega , given that the temperature coefficient of the materials of the resistors is 1.70 xx 10^-4 ^@C^-1 ?

On dissolving 2.0 g of metal in sulphuric acid ,4.51 g of the metal sulphate was formed . The specific heat of the metal is 0.057 cal g^(-1).^(@)C^(-1) . What is the valency of metal ?

A man pushes a body of mass 10 kg placed on a rough surface of co-efficient of friction 0.3 by a distance 5 m in 10 seconds,find his power.

A body of mass 25 g has a momentum of 0.40 kgms^-1 . Find its kinetic energy.

A body of mass 0.40 kg moving initially with a constant speed of 10 m s^-1 to the north is subject to a constant force of 8.0 N directed towards the south for 30 s. Take the instant the force is applied to be t = 0, the position of the body at that time to be x = 0, and predict its position at t = -5 s, 25 s, 100 s.

MODERN PUBLICATION-FORCE AND LAWS OF MOTION-EXAMPLE
  1. A bullet of mass 25 g moving with a speed of 100 m/s pierces a bag ful...

    Text Solution

    |

  2. A bullet of mass 25 g moving with a speed of 100 m/s pierces a bag ful...

    Text Solution

    |

  3. A body of mass 25 kg is dragged on a horizontal rough road with a cons...

    Text Solution

    |

  4. The velocity-time graph of a ball moving on a horizontal surface is sh...

    Text Solution

    |

  5. Which would require a greater force-accelerating a 2 kg mass at 5ms^-2...

    Text Solution

    |

  6. A force of 5N gives a mass m(1), an acceleration of 10m//s^(2), and a ...

    Text Solution

    |

  7. A motorcar of mass 1200 kg is moving along a straight line with a unif...

    Text Solution

    |

  8. A constant force acts on object of mass 5 kg for a duration of 2s It i...

    Text Solution

    |

  9. A rifle of mass 3 kg fires a bullet of mass 0.03 kg. The bullet leaves...

    Text Solution

    |

  10. A rifle of mass 3 kg fires a bullet of mass 0.03 kg. The bullet leaves...

    Text Solution

    |

  11. A bullet of mass 10g is fired from a rifle. The bullet takes 0.003 sec...

    Text Solution

    |

  12. Two bodies A and B of mass 5 kg and 10 kg contact with each other rest...

    Text Solution

    |

  13. Two bodies A and B of mass 5 kg and 10 kg contact with each other rest...

    Text Solution

    |

  14. A 40kg skatter moving at 4m/sec eastwards colloid head on with a 60kg ...

    Text Solution

    |

  15. Two bodeis A and B of masses 2.00 kg and 10.0 kg respectively moving i...

    Text Solution

    |

  16. Which of the following has more inertia : rubber ball and a stone of t...

    Text Solution

    |

  17. Which of the following has more inertia : a bicycle and a train ?

    Text Solution

    |

  18. Which of the following has more inertia : a five rupees coin and a one...

    Text Solution

    |

  19. In the following example, try to identify the number of times the velo...

    Text Solution

    |

  20. Explain why some of the leaves mayget detached from the tree if we vig...

    Text Solution

    |