Home
Class 12
PHYSICS
One coolie takes 1min to raise a box thr...

One coolie takes 1min to raise a box through a height of `2m`. Another one takes `30s` for the same job and does the same amount of work. Which one of the two has greater power and which one uses greater enegy?

A

`1:2`

B

`1:3`

C

`2:1`

D

`3:1`

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • WORK, ENERGY AND POWER

    AAKASH INSTITUTE|Exercise Assignment (SECTION - D)|15 Videos

  • WORK, ENERGY AND POWER

    AAKASH INSTITUTE|Exercise Assignment (SECTION - B)|39 Videos

  • WAVES

    AAKASH INSTITUTE|Exercise ASSIGNMENT ( SECTION-D ( Assertion - Reason Type Questions ))|12 Videos

Similar Questions

Explore conceptually related problems

One coolie takes 1 min to raise a box through a height 2 m . Another takes 30 s for the same job and does the same job and does the same amount of work. Which one of these two has a greater power and which one uses greaster energy ?

Which one of the following has greater active mass

One man takes 1 minute to raise a box to a height of 1 metre and another man takes 1/2 minute to do so. The energy of the two is

A light and a heavy body have the same kinetic energy. Which one of the two will have greater momentum ?

In which one of the following do the two names refer to one and the same thing

In which one of the following do the two names refer to one and the same thing ?

AAKASH INSTITUTE-WORK, ENERGY AND POWER-Assignment (SECTION - C)
  1. A simple pendulum with a bob of mass m oscillates from A to C and back...

    Text Solution

    |

  2. A car moving with a speed of 40 km//h can be stopped by applying the b...

    Text Solution

    |

  3. A child is swinging a swing. Minimum and maximum heights fo swing from...

    Text Solution

    |

  4. When a long spring is stretched by 2cm, its potential energy is U. If ...

    Text Solution

    |

  5. A ball of mass2 kg and another of mass 4 kg are dropped together from ...

    Text Solution

    |

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

    Text Solution

    |

  7. One coolie takes 1min to raise a box through a height of 2m. Another o...

    Text Solution

    |

  8. In a force of 9 N is acting on a body, then find instataneous power su...

    Text Solution

    |

  9. As shown in figure, a particle of mass m is performing vertical circul...

    Text Solution

    |

  10. The bob of pendulum of length l is pulled aside from its equilibrium p...

    Text Solution

    |

  11. A stone is tied to a string of length l and is whirled in a vertical c...

    Text Solution

    |

  12. The potential energy between two atoms in a molecule is given by U(x)=...

    Text Solution

    |

  13. The coefficient of restitution e for a perfectly elastic collision is

    Text Solution

    |

  14. A particle of mass m moving with velocity vecV makes a head on elastic...

    Text Solution

    |

  15. Two identical balls A and B having velocity of 0.5 m//s and -0.3 m//s ...

    Text Solution

    |

  16. A body of mass m moving with velocity 3km//h collides with a body of m...

    Text Solution

    |

  17. A rubber ball is dropped from a height of 5m on a plane, where the acc...

    Text Solution

    |

  18. A ball moving with velocity 2 ms^(-1) collides head on with another st...

    Text Solution

    |

  19. A metal ball of mass 2 kg moving with speed of 36 Km//h has a collisio...

    Text Solution

    |

  20. Two springs A and B (k(A)=2k(B)) are stretched by applying forces of e...

    Text Solution

    |