Home
Class 12
PHYSICS
A very broad elevator is going up vertic...

A very broad elevator is going up vertically with a constant acceleration of `2m//s^(2)`. At the instant when its velocity is `4m//s` a ball is projected form the floor of the lift with a speed of `4m//s` relative to the floor at an elevation of `30^(@)`. Time taken by the ball to return the floor is `(g=10ms^(2))`

A

`(1)/(2) S`

B

`(1)/(3) S`

C

`(1)/(4) S `

D

1S

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • NEET MOCK TEST 8

    NTA MOCK TESTS|Exercise PHYSICS - SINGLE CHOICE|45 Videos

  • NTA JEE MOCK TEST 100

    NTA MOCK TESTS|Exercise PHYSICS|25 Videos

Similar Questions

Explore conceptually related problems

A very broad elevator is going up vertically with a constant acceleration of 2m//s^(2) . At the instant when its velocity is 4m//s , a ball is projected from the floor of the lift wht as of 4m//s relative to the floor at an elevation of 30^(@) . The time taken by the ball to return the floor is (g=10m//s^(2))

An elavator is going up vertically with a constant accelerartion of 2m//s^(2) . At the instant when its velocity is 4m//s a ball is projected from the floor of the elavator with a speed of 4m//s relative to the floor with an angular eleavation of 60^(@) . The time taken by the ball to return the floor is (g=10m//s^(2))

A very broad elevator is going up vertically with constant acceleration of 2 m/s^(2) . At the instant when its velocity is 4 m/s a ball is projected from the floor of the lift with a speed of 4 m/s relative to the floor at an elevation of 30^(@) . The range of ball over the floor of the lift is :

An elecator is going up with an upward acceleration of 1m//s^2 . At the instant when its velocity is 2 m//s , a stone is projected upward from its floor with a speed of 2m//s relative to the elevator, at an elevation of 30^@ . (a) Calculate the time taken by the stone to return to the floor. (b) Sketch the path of the projectile as observed by an observer outside the elevator. (c) If the elevator was moving with a downward acceleration equal to g, how would the motion be altered?

A lift of very broad - floor is moving vertically upward with a constant retardation equal to 'g'. At an instant a stone is projected from a point on the floor of the lift at angle of elevation 0. Then the trajectory of the stone is:

An elevator car (lift) is moving upward with uniform acceleration of 2 m//s^(2) . At the instant, when its velocity is 2 m/s upwards a ball thrown upward from its floor. The ball strikes back the floor 2s after its projection. Find the velocity of projection of the ball relative to the lift.

An elevator with floor to roof height 24m starts moving upwards with a constant acceleration of 2(m)/(s^(2)). At t=2s ,a bolt on the roof loosens and falls. Time the bolt takes to travel from the roof to the floor of the elevator is g=10ms^(-2)]

An elevator, in which a man is standing, is moving upward with a constant acceleration of 2 m//s^2 . At some instant when speed of elevator is 10 m//s , the man drops a coin from a height of 1.5 m . Find the time taken by the coin to reach the floor.

A lift is moving with uniform downward acceleration of 2 m//s^(2) . A ball is dropped from a height 2 metre from the floor of lift. Find the time after which ball will strike the floor.

In an elevator moving vertically up with an acceleration g, the force exerted on the floor by a passanger of mass M is

NTA MOCK TESTS-NEET MOCK TEST 9-PHYSICS
  1. The image for the converging beam after refraction through the curved ...

    Text Solution

    |

  2. A point object is moving with velocity v(0) =2 hat(i) - 3 hat(j ) + 4h...

    Text Solution

    |

  3. A battery of internal resistance 4 Omega is connected to the network o...

    Text Solution

    |

  4. The displacement (s)- velocity ( v ) graph of a particle if it starts ...

    Text Solution

    |

  5. A very broad elevator is going up vertically with a constant accelerat...

    Text Solution

    |

  6. If A block is dragged on a smooth horizontal plane with the help of a ...

    Text Solution

    |

  7. A particle at the end of a spring executes simple harmonic motion with...

    Text Solution

    |

  8. Find the resultant amplitude of the following simple harmonic equation...

    Text Solution

    |

  9. A monochromatic ray of photons of energy 5 eV are incident on cathode....

    Text Solution

    |

  10. What is the reason behind the disturbing of incoming and reflected sig...

    Text Solution

    |

  11. By what factor does the de-Broglie wavelength of a free electron chang...

    Text Solution

    |

  12. There is a circular hole of diameter d =140 mu m at the bottom of a v...

    Text Solution

    |

  13. Water drains out of a vessel filled with water upto height h through a...

    Text Solution

    |

  14. An N-P-N transistor in a common emitter mode is used as a simple volta...

    Text Solution

    |

  15. In the figure there is a DC voltage regulator circuit, with a Zener br...

    Text Solution

    |

  16. The equation of a wave on a string of linear mass density 0.04 kg m^(-...

    Text Solution

    |

  17. There is a leak proof cylinder of length 1m,made of a metal that has v...

    Text Solution

    |

  18. In Young's double slit experiment a mica plate of refractive index mu ...

    Text Solution

    |

  19. A 10 kg stone is suspended with a rope of breaking strength 30 kg-wt. ...

    Text Solution

    |

  20. On which principle does sonometer work ?

    Text Solution

    |