Home
Class 11
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)`.

Text Solution

Verified by Experts

The correct Answer is:
`5.83 xx 10^(5) cal ,116.6^(@).^(@)C`
Promotional Banner

Topper's Solved these Questions

Similar Questions

Explore conceptually related problems

Find the heat energy required to raise the temperature of 5 kg of water at 80^@C to 100^@C . (Specific heat of water is 1 cal g^(-1)""^(@)C^(-1) )

Find the heat required to convert 20 g of iceat 0^(@)C into water at the same temperature. ( Specific latent heat of fusion of ice =80 cal//g )

A lead bullet of mass 50g moving with a velocity of 100ms^(-1) strikes a target. If 40% of the heat produced is retained by the bullet, calculate the rise in its temperature. Specific heat of lead = 0.03 cal g^(-1)K^(-1) and J = 4.2 J cal^(-1)

A lead bullet weighing 20 g and moving with a velocity of 100 ms^(-1) comes to rest in a fixed block of wood. Calculate the heat developed and the rise in temperature of the bullet assuming that the half of the heat is absorbed by the bulley. The specific heat of lead is 0.03 cal g^(-1).^(@)C^(-1) .

A person weighing 50 kg takes in 1500 kcal dict per day. If this energy were to be used in heating the body of person without any losses, then the rise in his temperature is ( specific heat of human body = 0.83 calg^(-1)C^(-1) )

Calculate the change in internal energy when 5g of air is heated from 0^(@) to 4^(@)C . The specific heat of air at constant volume is 0.172 cal g^(-1) .^(@)C^(-1) .

A body of mass 2 kg is placed on a horizontal surface having coefficient of kinetic friction 0.4 and limiting coefficient of static friction 0.5. If a horizontal force 2.5 N is applied on the body, the frictional force acting on the body will be (Take, g = 10ms^(2) )

If 2000kg of water is heated from 0^(@) C to 100^(@)C , what will be the corresponding increase in mass of water? Take specific heat of water =1cal. g^(-1).^(@)C^(-1) .

50 gm of copper is heated to increase its temperature by 10^(@)C. If the same quantity of heat is given to 10 gm of water, the rise in its temperature is (Specific heat of copper =420 Joule-kg^(-1)@C^(-1)

SL ARORA-HEAT-Problem For Self Practice
  1. A heavy box having a mass of 2 quintal is pulled along the floor for 8...

    Text Solution

    |

  2. In the Joule experiment, a mass of 20 kg falls through 1.5m at a const...

    Text Solution

    |

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

    Text Solution

    |

  4. A worker eats a dish of icecream which funishes 200 kcal of heat. If t...

    Text Solution

    |

  5. When water is boiled at 2 atm pressure the latent heat of vaporization...

    Text Solution

    |

  6. When 10 g of coal is burnt, it raises the temperature of 2 litres of w...

    Text Solution

    |

  7. A person weighing 60 kg takes in 2000 kcal diet in a day. If this ener...

    Text Solution

    |

  8. 0.75 gram of petroleum was burnt in a bomb calorimeter which contains ...

    Text Solution

    |

  9. The heat of combustion of ethane gas at 373 k cal per mole. Assume tha...

    Text Solution

    |

  10. A refrigeratior converts 50 gram of water at 15^(@)C intoice at 0^(@)C...

    Text Solution

    |

  11. 1.50 gram of ice is mixed in 300 gram of water at 50^(@)C. Determine t...

    Text Solution

    |

  12. How many grams of ice at -14 .^(@)C are needed to cool 200 gram of wa...

    Text Solution

    |

  13. Calculate the heat required to convert 3 kg of ice at -12^(@)C kept in...

    Text Solution

    |

  14. A piece of iron of mass 100g is kept inside a furnace for a long time ...

    Text Solution

    |

  15. An electric heater of power 100 W raises the temperature of 5 kg of a ...

    Text Solution

    |

  16. Calculate the two specific heats of nitrogen from the following data :...

    Text Solution

    |

  17. Calculate the two specific heats of nitrogen from the following data :...

    Text Solution

    |

  18. Calculate the specific heat capacity at constant volume for a gas. Giv...

    Text Solution

    |

  19. Calculate difference in specific heats for 1 gram of air at N.T.P. Giv...

    Text Solution

    |

  20. Calculate C(P) for air, given that C(v) = 0.162 cal g^(-1)K^(-1) an...

    Text Solution

    |