Home
Class 12
PHYSICS
A lift is coming from 8th floor and is j...

A lift is coming from 8th floor and is just about to reach 4th floor. Taking ground floor as origin and positive direction upwards for all quantities, which one of the following is correct ?

A

`x lt 0 , v lt 0 , a gt 0`

B

`x gt 0 , v lt 0 , a lt 0`

C

`x gt 0, v lt 0 , a gt 0`

D

`x gt 0, v gt 0 , a lt 0`

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • MOTION IN A STRAIGHT LINE

    AAKASH SERIES|Exercise EXERCISE -II|80 Videos

  • MOTION IN A STRAIGHT LINE

    AAKASH SERIES|Exercise PRACTICE EXERCISE|58 Videos

  • MOTION IN A STRAIGHT LINE

    AAKASH SERIES|Exercise very Short answer type question|15 Videos

  • MOTION IN A PLANE

    AAKASH SERIES|Exercise QUESTION FOR DESCRIPTIVE ANSWER|7 Videos

  • MOVING CHARGES AND MAGNETISM

    AAKASH SERIES|Exercise EXERCISE-III|49 Videos

Similar Questions

Explore conceptually related problems

A uniform plank is resting over a smooth horizontal floor and is pulled by applying a horizontal force at its one end. Which of the following statements are not correct?

A uniform plank is resting over a smooth horizontal floor and is pulled by applying a horizontal force at its one end. Which of the following statements are not correct?

A particle is resting over a smooth horizontal floor. At t = 0, a horizontal force starts acting on it. Magnitude of the force increases with time according to law F = alpha t, Where alpha is a positive constant. From figure, which of the following statements are correct ?

A wheel is released on a rough horizontal floor after imparting it an initial horizontal velocity v_(0) and angular velocity omega_(0) as shown in the figure below. Point O is the centre of mass of the wheel and point P is its instantaneous point of contact with the groundl. The radius of wheel is r and its radius of gyration about O is k . Coefficient of friction between wheel and ground is mu . A is a fixed point on the ground. Which of the following is conserved ?

A thin and uniform rod of mass M and length L is held vertical on a floor with large friction. The rod is released from rest so that it falls by rotating about its contact-point with the floor without slipping. Which of the following statement(s) is(are) correct, when the rod makes an angle 60° with vertical? [g is the acceleration due to gravity]

Consider the Bohr's model of a one-electron atom where the electron moves around the nucleus. In the following, List-I contains some quantities for the n^("th") orbit of the atom and List-II contains options showing how they depend on n. Which of the following options has the correct combination considering List-I and List-II?

A 1.5 kg block placed on a frictless orizontal floor is pulled by a force F Direction of the force is unchanged and its magnitude is incrcresaed with time according to the equation F =0.5 t n where t denotes time in second . Which of the following is /are correct for subsequunt motion after t=0 s? [ g=10m//s^(2) ]

9 persons enter a lift from ground floor of a building which stops in 10 floors (excluding ground floor), if it is known that persons will leave the lift in groups of 2,3, & 4 in different floors. In how many ways this can happen?

Five persons entered the lift cabin on the ground floor of a 8 floor house. Suppose each of them can leave the cabin independently at any floor beginning with the first. The total number of ways in which each of the five person can leave the cabin at any one of the 7 floor, is (a) 5^(7) (b) 7^(5) (c) 35 (d) 2520

AAKASH SERIES-MOTION IN A STRAIGHT LINE -EXERCISE -I
  1. The ratio of the numerical values of the average velocity and average ...

    Text Solution

    |

  2. A person travelling on a straight line moves with a uniform velocity v...

    Text Solution

    |

  3. A lift is coming from 8th floor and is just about to reach 4th floor. ...

    Text Solution

    |

  4. Which of following statements is incorrect?

    Text Solution

    |

  5. (A) : A body can have acceleration even if its velocity is zero at a g...

    Text Solution

    |

  6. The displacement of a particle starts from rest is proportional to the...

    Text Solution

    |

  7. (Assertion) :A body may be accelerated even when it is moving at unifo...

    Text Solution

    |

  8. What determines the nature of the path followed by the particle

    Text Solution

    |

  9. The position-time (x-t) graphs for two children A and B returning from...

    Text Solution

    |

  10. At time t = 0, two bodies A and B at the same point. A moves with cons...

    Text Solution

    |

  11. Two bodies of different masses are dropped similtaneously from the top...

    Text Solution

    |

  12. At a metro station, a girl walks up a stationary escalator in time t1....

    Text Solution

    |

  13. Two bodies of different masses are dropped simultaneously from the top...

    Text Solution

    |

  14. The acceleration of a moving body can be found from

    Text Solution

    |

  15. A body falls freely from a height 'h' its average velocity when it rea...

    Text Solution

    |

  16. For a moving body at any instant of time

    Text Solution

    |

  17. A body falls freely from a height 'h' after two seconds if accelaratio...

    Text Solution

    |

  18. A body falls freely from a height 'h' after two seconds if we assume t...

    Text Solution

    |

  19. For a freely falling body

    Text Solution

    |

  20. A hydrogen balloon released on the moon from a height will

    Text Solution

    |