Home
Class 12
PHYSICS
A lift starts moving down with 20 m//s^(...

A lift starts moving down with `20 m//s^(2)`. Then which of the following is not true ?

A

Acceleration of 5kg block along incline is `15 m//s^(2)`

B

Normal force is `25 sqrt( 3)` and acceleration is `5 m//s^(2)` along incline

C

Normal force is zero

D

Acceleration of 5kg is `20 m//s^(2)` downwards

Text Solution

Verified by Experts

The correct Answer is:
A, B, D
Promotional Banner

Topper's Solved these Questions

  • NLM & FRICTION

    MOTION|Exercise EXERCISE-3(Level-I)|18 Videos

  • NLM & FRICTION

    MOTION|Exercise EXERCISE-3(Level-II)|12 Videos

  • NLM & FRICTION

    MOTION|Exercise EXERCISE-2|66 Videos

  • NEWTON'S LAWS OF MOTION & FRICTION

    MOTION|Exercise Exercise - 3 Section-B|12 Videos

  • ONE DIMENSION MOTION

    MOTION|Exercise Exercise - 3 |Section - B Previous Year Problems | JEE MAIN|12 Videos

Similar Questions

Explore conceptually related problems

When a lift is moving up with a uniform speed of 1 m/s. the weight of a man recorded bby a weighing machine in the lift is 70 kg . If the lift starts moving down with a uniform speed of 2 m/s, the weight of the man recorded by the weighing machine will be

A block of mass 2kg is kept inside a lift. Lift starts moving downward with an acceleration of a=12m/ s^(2) .Height of the lift is 4m .Time after which block will strike roof of the lift is?

A particle experiences constant acceleration for 20 s after starting from rest. If it travels a distance X_(1) , in the first 10 s and distance X_(2) , in the remaining 10s, then which of the following is true?

The weight of a man standing on a weighing machine in a lift is noted when (i) the lift is moving with a uniform velocity and (ii) the lift is moving down with an acceleration a. The ratio of the two weights is 4/3 . What is the value of a

A barometer kept in a lift reads 11 cm of mercury, when the lift is stationary. Then the lift starts moving down with an acceleration a, where a lt g. What is the air pressure in the lift, as read by the barometer ?

In the figure it is shown that the velocity of lift is 2 m s^(-1) while string is winding on the motor shaft with velocity 2 m s^(-1) and shaft A is moving downward with velocity 2 m s^(-1) with respect to lift , then find out the velocity of block B

A young man of mass 60 kg stands on the floor of a lift which is acceleration downwards at 1m//s^(2) then the reaction of the floor of the lift on the man is (Take g = 9.8 m//s^(2) )

body moves along x-axis with velocity v = 5 sin(2t)m/s starting from x_i =-2.5 m Which of the following statements are correct ?

A particle is travelling with initial veocity of 2 m//s and moves in a straight line with a restardation of 0.1 m//s^(2) . The time at which the particle is 15 m from the starting point is :

MOTION-NLM & FRICTION-EXERCISE-2(Level-II)
  1. A block of mass 1 kg is at rest relative to a smooth wedge leftwards ...

    Text Solution

    |

  2. A wedge of mass m(1) and a block of mass m(2) are in equlibrium as sho...

    Text Solution

    |

  3. As shown in figure two blocks A and B of mass 1kg each are connected b...

    Text Solution

    |

  4. A block of mass 1 kg is placed on a rough wedge which is fixed on an e...

    Text Solution

    |

  5. In the system shown in the diagram all surfaces are smooth, pulley and...

    Text Solution

    |

  6. Two masses m(1)=4kg and m(2)=2kg are connected with an nextansible , m...

    Text Solution

    |

  7. A block A of mass 7 kg is placed on a frictionless table. A thread tie...

    Text Solution

    |

  8. In the system shown in the figure m(1) gt m(2). System is held at rest...

    Text Solution

    |

  9. A lift starts moving down with 20 m//s^(2). Then which of the followin...

    Text Solution

    |

  10. A particle slides down a smooth inclined plane of elevation theta fixe...

    Text Solution

    |

  11. Which of the following is true ?

    Text Solution

    |

  12. A block of mass 2.5 Kg is kept on a rough horizontal surface. It is fo...

    Text Solution

    |

  13. NOT QUESTION

    Text Solution

    |

  14. As shown in figure, A is a man of mass 60 kg standing on a block B of ...

    Text Solution

    |

  15. In the figure, the blocks are of equal mass. The pulley is fixed. In t...

    Text Solution

    |

  16. Two blocks A and B of equal mass m are connected through a massless st...

    Text Solution

    |

  17. In the system of connected bodies in the adjoining figure. The surface...

    Text Solution

    |

  18. Two blocks of masses m(1) and m(2) are connected through a massless in...

    Text Solution

    |

  19. A long block A is at rest on a smooth horizontal surface. A small bloc...

    Text Solution

    |

  20. Two blocks on a rough incline are connected by a light string that pas...

    Text Solution

    |