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"A lift is ascending with decreasing spe...

"A lift is ascending with decreasing speed". What are the directions of velocity and acceleration of the lift at the given instant.

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A, B, D
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A lift is going up. The total mass of the lift and the passengers is 1500 kg . The variation in the speed of the lift is given by the graph shown in Fig . What will be the tension in the rope pulling the lift at (i) t = 1 s , (ii) t =6 s (iii) t = 11 s ? What is the height to which the lift takes the passengers ? During the course of entirs motion What is the average velocity and average acceleration of the lift ? Taken g = 9.8 m//s^(2) .

A body of 100 kg stands on a spring weighing machine inside a lift. The lift starts to ascend with acceleration of 2.2ms^(-2) . What is the reading of the machine inside a lift. The lift starts to ascend with acceleration of 2.2ms^(-2) . What is the reading of the machine?

Knowledge Check

  • Assertion : A lift is ascending with decreasing speed means acceleration of lift is downwards. Reason : A body always moves in the direction of its acceleration.

    A
    If both Assertion and Reason are correct and Reason is the correct explanation of assertion.
    B
    If both Assertion and Reason are correct but Reason in not the correct explanation of Assertion.
    C
    If Assertion is true but Reason is false.
    D
    If Assertion is false but Reason is true.

  • A lift is ascending with a constant speed ''V''. A passenger in the lift drops a coin. The acceleration of the coin towards the floor will be

    A
    Zero
    B
    g
    C
    `ltg`
    D
    `gtg`

  • A lift is asecending with a constnat speed ''V''. A passenger in the lift drops a coin. The acceleration of the coin towards the floor will be .

    A
    Zero
    B
    g
    C
    `lt g`
    D
    `gt g`

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    A lift is moving down with acceleration a. A man in the lift drops a ball inside the lift. Find the acceleration of the ball as observed bt the man in the lift and a man standing stationary on the ground

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    A man stands on a weighing machine kept inside a lift. Initially the lift is ascending with the acceleration 'a' due to which the reading is W . Now the lift decends with the same acceleration and reading 10% of initial. Find the acceleration of lift ?

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