Home
Class 11
PHYSICS
An engine develops 10 kW of power. How m...

An engine develops 10 kW of power. How much time will it take to lift a mass of 200 kg to a height of 40 m (`g=10(m)/(sec^2)`)`?

A

4 sec

B

5 sec

C

8 sec

D

10 sec

Text Solution

Verified by Experts

The correct Answer is:
C
`P= (mgh)/(t)= 10 xx 10^(3) rArr t= (200 xx 40 xx 10)/(10 xx 10^(3))= 8sec`
Promotional Banner

Topper's Solved these Questions

  • WORK , ENERGY , POWER AND COLLISION

    ERRORLESS |Exercise Ordinary Thinking (Objective Questions) (Elastic and Inelastic Collision)|68 Videos

  • WORK , ENERGY , POWER AND COLLISION

    ERRORLESS |Exercise Ordinary Thinking (Objective Questions) (Perfectly Inelastic Collision)|30 Videos

  • WORK , ENERGY , POWER AND COLLISION

    ERRORLESS |Exercise Ordinary Thinking (Objective Questions) (Conservation of Energy and Momentum)|87 Videos

  • WAVES AND SOUND

    ERRORLESS |Exercise SET|25 Videos

  • WORK, ENERGY, POWER & COLLISION

    ERRORLESS |Exercise Assertion|30 Videos

Similar Questions

Explore conceptually related problems

An engine develops 20 kW of power. How much tie will it take to lift a mass of 400 kg to a height lf m? (g=10 ms^(-2))

An engine can develop a power of 5kW. How much time it will take to lift a mass of 100 kg to a height of 80 m? (g=10m//s^(2))

The power (P) of an engine lifting a mass of 100 kg upto a height of 10 m in 1 min is

Calculate the power of a crane in watts, which lifts a mass of 100 kg to a height of 10 m in 20 s .

The power of pump, which can pump 200 kg of water to height of 200 m in 10 s (g=10(m)//(s^2) )

The engine of a water pump develops a power of 5 kW. How much time it will takes to lit 500 litre of water from the bottom of the building to the terrace at a height of 20 m? [g=10m//s^(2)]

ERRORLESS -WORK , ENERGY , POWER AND COLLISION-Ordinary Thinking (Objective Questions) (Power)
  1. A weight lifter lifts 300kg from the ground to a height of 2 meter in ...

    Text Solution

    |

  2. If a force vecF=5hati+5hatj+6hatk causes a displacement vecs=3hati+6ha...

    Text Solution

    |

  3. An engine develops 10 kW of power. How much time will it take to lift ...

    Text Solution

    |

  4. A car of mass m is driven with acceleration a along a straight level r...

    Text Solution

    |

  5. The average power required to lift a 100 kg mass through a height of 5...

    Text Solution

    |

  6. From a waterfall, water is falling down at the rate of 100kg / s on th...

    Text Solution

    |

  7. The power of pump, which can pump 200 kg of water to height of 200 m i...

    Text Solution

    |

  8. A 10 H.P. motor pumps out water from a well of depth 20 m and fills a ...

    Text Solution

    |

  9. A car of mass 1250 kg is moving at 30(m)//(s). Its engine delivers 30 ...

    Text Solution

    |

  10. A force applied by an engine of a train of mass 2.05xx10^6kg changes i...

    Text Solution

    |

  11. A truck of mass 30,000 kg moves up an inclined plane of slope 1 in 100...

    Text Solution

    |

  12. A 60 kg man runs up a staircase in 12 seconds while 50 kg man runs up ...

    Text Solution

    |

  13. A pump motor is used to deliver water at a certain rate from a given p...

    Text Solution

    |

  14. What average horsepower is developed by an 80 kg man while climbing in...

    Text Solution

    |

  15. A car of mass 1000 kg accelerates uniformly from rest to a velocity of...

    Text Solution

    |

  16. A quarter horse power motor runs at a speed of 600 r . p . m . Assumin...

    Text Solution

    |

  17. An engine pumps up 100 kg water through a height of 10 m in 5 s. If ef...

    Text Solution

    |

  18. A force 2hati+3hatj+4hatk N acts on a body for 4 sec, produces a displ...

    Text Solution

    |

  19. The power of pump, which can pump 200 kg of water to a height of 50 m ...

    Text Solution

    |

  20. From an automatic gun a man fires 360 bullet per minute with a speed o...

    Text Solution

    |