Home
Class 11
PHYSICS
An elevator starts from rest with a cons...

An elevator starts from rest with a constant upward acceleration it moves 2m in the first `0.6` second. A passenger in the elevator is holding a 3 kg package by a vertical string When the elevator is moving What is the tension in the string?

A

4 N

B

`62.7 N`

C

`29.4 N`

D

`20.6 N`

Text Solution

Verified by Experts

The correct Answer is:
B
`h=1/2at^(2)`
`a=100/9 m//sec^(2)`
`T=M(g+a)`
Promotional Banner

Topper's Solved these Questions

  • FORCE AND NEWTONS LAWS OF MOTION

    GRB PUBLICATION|Exercise More than one choice is correct|15 Videos

  • FORCE AND NEWTONS LAWS OF MOTION

    GRB PUBLICATION|Exercise Assertion- Reason|4 Videos

  • FORCE AND NEWTONS LAWS OF MOTION

    GRB PUBLICATION|Exercise Problem for practice|30 Videos

  • BASIC MATHEMATICS

    GRB PUBLICATION|Exercise Problems For Practice|35 Videos

  • FRICTION AND CIRCULAR MOTION

    GRB PUBLICATION|Exercise Comprehension type|11 Videos

Similar Questions

Explore conceptually related problems

An elevator starts from rest with a constant upward acceleration. It moves 5 m in the first 2 s. A passenger in the elevator is holding a 4 kg package by a vertical string. Find the tension in the string during the acceleration process in N.

A lift starts from rest with a constant upward acceleration It moves 1.5 m in the first 0.4 A person standing in the lift holds a packet of 2 kg by a string Calculate the tension in the string during the motion .

An elevator starts from rest with a constant downward acceleration and covers 2.5m in first second If the lift weighs 200kg what would be the tension in the ropes of the lift ?

An elevator is accelerating upwards with a constant acceleration a ms^-2 . If a coin is dropped in it by a passenger, then.

An elevator is moving vertically up with a acceleration a the force exerted on the floor by a passenger of mass m is

A pendulum bob is hanging from the roof of an elevator with the help of a light string. When the elevator moves up with uniform acceleration 'a' the tension in the string is T_(1) . When the elevator moves down with the same acceleration, the tension in the string is T_(2) . If the elevator were stationary, the tension in the string would be

Consider an elevator moving downwards with an acceleration a, the force exerted by a passenger of mass m on the floor of the elevator is :

GRB PUBLICATION-FORCE AND NEWTONS LAWS OF MOTION-Objective Questions
  1. The length of an elastic string is x when tension is 5N. Its length is...

    Text Solution

    |

  2. A rocket is fired from the earth's surface to put the pay load in the ...

    Text Solution

    |

  3. An elevator starts from rest with a constant upward acceleration it mo...

    Text Solution

    |

  4. A uniform thick string of length 5 m is resting on a horizontal frict...

    Text Solution

    |

  5. A body of mass M rests on a horizontal plane having coefficient of fri...

    Text Solution

    |

  6. In the adjoining diagram the ball A is released from rest when the spr...

    Text Solution

    |

  7. A closed compartment containing gas is moving with some acceleration i...

    Text Solution

    |

  8. A block of mass m is placed on a smooth wedge of wedge angle theta The...

    Text Solution

    |

  9. Sand is being dropped on a conveyor belt at the rate of Mkg//s . The f...

    Text Solution

    |

  10. The line of action of the resultant of two like parallel forces shifts...

    Text Solution

    |

  11. If a particle is compelled to mvoe on a given smooth plane curve under...

    Text Solution

    |

  12. A ball of mass 150 gm starts moving at 20m//s and is hit by a force wh...

    Text Solution

    |

  13. If a man of ,mass M jumps to the ground from a height h and his centr...

    Text Solution

    |

  14. A bullet moving with a speed 'v' can just penetrate two planks of equa...

    Text Solution

    |

  15. In the system shown in fig the mass 30 kg is pulled by a force 210 N A...

    Text Solution

    |

  16. In the system shown in fig when both masses are moving with the same a...

    Text Solution

    |

  17. In the system shown in fig the pulley is frictionless and the string m...

    Text Solution

    |

  18. In the system shown in fig the pulley is frictionless and the string m...

    Text Solution

    |

  19. In fig tension in the string that connects the masses A and B is T(1) ...

    Text Solution

    |

  20. In a conservative field at stable equilibrium potential energy is:

    Text Solution

    |