Home
Class 11
PHYSICS
If a body of mass 100 kg takes hight 60 ...

If a body of mass 100 kg takes hight 60 m in 1 minute how much power is needed ? `( g = 9.8 m//s^(-2))`

A

100 W

B

980 W

C

`9.8` W

D

1980 W

Text Solution

Verified by Experts

The correct Answer is:
B
Work done (W0 = Fd = mgd
`W= 100 xx 9.8 xx60`
Power = `W/t =(100xx9.8 xx60)/60`
= 980W
Promotional Banner

Topper's Solved these Questions

  • WORK, ENERGY AND POWER

    KUMAR PRAKASHAN|Exercise QUESTION PAPER (SECTION - A)|6 Videos

  • WORK, ENERGY AND POWER

    KUMAR PRAKASHAN|Exercise QUESTION PAPER (SECTION - B)|2 Videos

  • WORK, ENERGY AND POWER

    KUMAR PRAKASHAN|Exercise SECTION - E Multiple Choice Questions (MCQs)|64 Videos

  • WAVES

    KUMAR PRAKASHAN|Exercise SECTION-F (Questions From Module) (Sample questions for preparation of competitive exams)|23 Videos

Similar Questions

Explore conceptually related problems

How much power is required a lift a body of mass 50 kg to a height of 120 m in 1 minute ? (g = 9.8 m//s^(2)) .

1 kg m = 9.8 J

Find the energy possessed by an object of mass 10kg when it is at a height of 6m above the ground. Given g=9.8ms^(-2) .

A body of mass 1 kg is thrown upwards with a velocity 20 ms^(-1) .It momentarily come to rest after attaining a height of 18 m . How much energy is lost due to air friction (g = 10 m//s^(-2))

The frictional force of the air on the body of mass 0.25kg, falling with an acceleration of 9.2 m//s^(2) will be (g=9.8m//s^(2)) .

A boy lifts a mass of 300g for 1.2 second at height of 4m. What would be the power of boy? (Take g=10ms^(-2) ).

The total kinetic energy of a body of mass 10 kg and radius 0.5 m moving with velocity of 2 m/s without slipping is 32.8 J. The radius of gyration of a body is ………..

KUMAR PRAKASHAN-WORK, ENERGY AND POWER -SECTION - F Questions From Module (Sample questions for preparation of competitive exams)
  1. A particle fall freely from height s . At certain height its kinetic ...

    Text Solution

    |

  2. A body of mass 3 kg fall freely from the building of height 60 m . ...

    Text Solution

    |

  3. A mass of 0.5 kg moving with a speed of 1.5 m/s on a horizontal smooth...

    Text Solution

    |

  4. inelastic collision of two sphere of right body ………

    Text Solution

    |

  5. Two bodies of mass 1 g and 4 g moving with equal kinetic energy then ...

    Text Solution

    |

  6. How much work done in pulling up a block of wood weighing 2kN for leng...

    Text Solution

    |

  7. The kinetic energy of a body becomes four times its intial value , the...

    Text Solution

    |

  8. An electron , a proton a deutron and alpha - particle have the same k...

    Text Solution

    |

  9. If a body of mass 100 kg takes hight 60 m in 1 minute how much power i...

    Text Solution

    |

  10. An engine delivered power of 30 kW to a car of mass 1250 kg and veloci...

    Text Solution

    |

  11. Which one of the following force is non- conservative ?

    Text Solution

    |

  12. A body of mass 1 kg is thrown upwards with a velocity 20 ms^(-1) .It m...

    Text Solution

    |

  13. If the kinetic energy of the body is increased by 300 % then , the in...

    Text Solution

    |

  14. A car of mass m is driven with acceleration 'a' along a staright leve...

    Text Solution

    |

  15. A man whose mass is 50 kg climbs up 20 steps of the stairs with mass o...

    Text Solution

    |

  16. A sphere of mass 2 kg moving at 36 km/hr collides head on with anothe...

    Text Solution

    |

  17. Two bodies of masses m(1) and m(2) have same linear momentum . The rat...

    Text Solution

    |

  18. An elastic balls falls from a height of 10 m . If lose 80 % of its to...

    Text Solution

    |

  19. A ball moving with velocity 2m/s collides head on with another station...

    Text Solution

    |

  20. A bullet is fired from agun . If it recoils freely then kinetic energy...

    Text Solution

    |