Home
Class 11
PHYSICS
A block of mass M is kept on a platform ...

A block of mass M is kept on a platform which is accelerated upward with a constant acceleration 'a' during the time interval T. The work done by normal reaction between the block and platform is

A

`-(MgaT^(2))/(2)`

B

`(1)/(2) M(g+a)aT^(2)`

C

`(1)/(2) Ma^(2)T`

D

Zero

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

Similar Questions

Explore conceptually related problems

A block of mass M is kept on a platform which starts accelerating upwards from rest with a constant acceleration a. During the time interval T, the work done by contact froce on mass M is (##NAR_NEET_PHY_XI_P2_C06_E09_011_Q01##)

A block of mass m is kept on a platform which starts from rest with constant acceleration g/4 upward, as shown in the figure. Work done by normal reaction on block in time t is:

A block of mass m is kept on a platform which starts from rest with constant acceleration g/2 upward, as shown in fig. Work done by normal reaction on block in time t is :

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 block of mass M is kept in elevator (lift) which starts moving upward with constant acceleration b as shown in figure. Initially elevator at rest. The block is observed by two observers A and B for a time interval t=0 to t=T . Observer B is at rest with respect to elevator and observer A is standing on the ground. Q. The observer A finds that work done by normal reaction acting on the blocks is

A block of mass M is kept in elevator (lift) which starts moving upward with constant acceleration b as shown in figure. Initially elevator at rest. The block is observed by two observers A and B for a time interval t=0 to t=T . Observer B is at rest with respect to elevator and observer A is standing on the ground. Q. The observer A finds that the work done by gravity on the block is

A block of mass m is suspended by a light thread from an elevator. The elevator is accelerating upward with uniform acceleration a. The work done by tension on the block during t seconds is (u = 0)

A block of mass 1 kg is at rest relative to a smooth wedge leftwards with constant acceleration a =5 m//s^(2) .Let N be the normal reaction between the block and the wedge. Then ( g = 10 m//s^(2) )

A block of mass 1 kg is at rest relative to a smooth wedge moving leftwards with constant acceleration a = 5 m//s^(-2) .Let N be the normal reation between the block and the wedge . Then (g = 10 m//s^(-2))

DISHA-WORK, ENERGY AND POWER-Physics
  1. A block of mass m rests on a rough horizontal surface (Coefficient of ...

    Text Solution

    |

  2. A force act on a 30 gm particle as a friction of the particle as a fun...

    Text Solution

    |

  3. A body of mass M(1) collides elastically with another mass M(2) at res...

    Text Solution

    |

  4. A ball of mass 'm' moving with a horizontal velocity 'v' strikes the b...

    Text Solution

    |

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

    Text Solution

    |

  6. A particle of mass m1 is moving with a velocity v(1) and another parti...

    Text Solution

    |

  7. A bolck of mass 10 kg is moving in x-direction with a constant speed o...

    Text Solution

    |

  8. Identify the false statement from the following

    Text Solution

    |

  9. A one-ton car moves with a constant velocity of 15 ms^(–1) on a rough ...

    Text Solution

    |

  10. A ball is dropped from the top of a tower. The ratio of work done by f...

    Text Solution

    |

  11. Two sphere A and B of masses m(1) and m(2) respectivelly colides. A is...

    Text Solution

    |

  12. A 2kg block slides on a horizontal floor with the a speed of 4m//s it ...

    Text Solution

    |

  13. A uniform chain of length 2m is kept on a table such that a length of...

    Text Solution

    |

  14. A mass 'm' moves with a velocity 'v' and collides inelastieally with a...

    Text Solution

    |

  15. A mass 'm' moves with a velocity 'v' and collides inelastieally with a...

    Text Solution

    |

  16. A spherical ball of mass 20kg is stationary at the top of a hill of he...

    Text Solution

    |

  17. A block of mass M is kept on a platform which is accelerated upward wi...

    Text Solution

    |

  18. A srping lies along the x-axis attached to a wall at one end and a blo...

    Text Solution

    |

  19. The K.E. acquired by a mass m in travelling a certain distance d, star...

    Text Solution

    |

  20. A vertical spring with force constant k is fixed on a table. A ball of...

    Text Solution

    |