Home
Class 12
PHYSICS
A cord is used to lower vertically a blo...

A cord is used to lower vertically a block of mass `M`, a distance `d` at a constant downward acceleration of `(g)/(4)`, then the work done by the cord on the block is

A

`Mg.(d)/(4)`

B

`3Mg.(d)/(4)`

C

`-3Mg.(d)/(4)`

D

Mgd

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • WORK ENERGY AND POWER

    VMC MODULES ENGLISH|Exercise IMPECCABLE|54 Videos

  • WORK ENERGY AND POWER

    VMC MODULES ENGLISH|Exercise ENABLE|50 Videos

  • WAVE MOTION

    VMC MODULES ENGLISH|Exercise JEE ADVANCED ARCHIVE LEVEL 2 (TRUE FALSE TYPE)|4 Videos

Similar Questions

Explore conceptually related problems

A string is used to pull a block of mass m vertically up by a distance h at a constant acceleration (g)/(3) . The work done by the tension in the string is

A block of mass m tied to a string is lowered by a distance d, at a constant acceleration of g//3 . The work done by the string is

A block of mass m tied to a string is lowered by a distance d, at a constant acceleration of g//3 . The work done by the string is

A block of mass m tied to a string is lowered by a distance d, at a constant acceleration of g//3 . The work done by the string is

A man pulls out a block of mass m from the depth d with help of a light string. If acceleration of the block is g/2 then the work done by the string on the block will be

A body of mass m is allowed to fall with the help of string with downward acceleration (g)/(6) to a distance x. The work done by the string is

A force F is applied on a block of mass M . The block is displaced through a distance d in the direction of the force. What is the work done by the force on the block? Does the internal energy change because of this work?

A block of mass m is kept on a platform Platform starts moving upwards with an acceleration of g/2 . Find the work done by the normal force on the block in the first one second.

A mass M is lowered with the help of a string by a distance h at a distance acceleration g//2 . The work done by the string will be

A block of mass 5kg is being raised vertically upwards by the help of a string attached to it. It rises with an acceleration of 2ms^-2 . Find the work done by the tension in the string if the block rises by 2.5m . Also find the work done by the gravity and the net work done.

VMC MODULES ENGLISH-WORK ENERGY AND POWER -EFFICIENT
  1. A small body of mass m is located on a horizontal plane at the point O...

    Text Solution

    |

  2. A ball moves on a frictionless inclined table without slipping. The wo...

    Text Solution

    |

  3. A cord is used to lower vertically a block of mass M, a distance d at ...

    Text Solution

    |

  4. A rod of length 1.0 m and mass 0.5 kg fixed at one end is initially ha...

    Text Solution

    |

  5. A ball moving with a velocity v hits a massive wall moving towards the...

    Text Solution

    |

  6. A projectile projected with initial velocity 20m/s and at and angle of...

    Text Solution

    |

  7. A particle of mass 1 kg is moving along x - axis and a force F is also...

    Text Solution

    |

  8. If a projectile is projected with initial speed u and angle theta from...

    Text Solution

    |

  9. An 8 kg block accelerates uniformly from rest to a velocity of 4 m s^(...

    Text Solution

    |

  10. Consider the following statement. When jumping from some height, you s...

    Text Solution

    |

  11. An engine is working at a constant power draws a load of mass m agains...

    Text Solution

    |

  12. The potential energy of a system increase,if work is done

    Text Solution

    |

  13. A body projected vertically from the earth reaches a height equal to e...

    Text Solution

    |

  14. Power applied to a particle varies with time as P=(4t^(3)-5t+2) watt, ...

    Text Solution

    |

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

    Text Solution

    |

  16. What is work done when body will displaces perpendicular to the force ...

    Text Solution

    |

  17. A tube - well pump out 2400 kg of water per minute. If water is comin...

    Text Solution

    |

  18. A mass m moving horizontal (along the x-axis) with velocity v collides...

    Text Solution

    |

  19. A car of mass m starts from rest and accelerates so that the instantan...

    Text Solution

    |

  20. A solid cylinder of mass 3 kg is rolling on a horizontal surface with ...

    Text Solution

    |