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The apparent weight of an object increas...

The apparent weight of an object increases in an elevator while accelerating upward. A moongphaliwala sells his moongphali usinga beam balance in an elevator. Will he gain more if the elevator is accelerating up?

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A barometer kept in an elevator accelerating upward reads 76 cm. The air pressure in the elevator is

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Knowledge Check

  • A spring of spring constant 200N//m has a block of mass 1kg hanging at its one end and other end of spring is attached to ceiling of an elevator. The elevator is rising upwards with an acceleration g//3 . What should be the angular frequency and elongation during the time when the elevator is accelerating?

    A
    `14.14 rad//s, 0.07 m`
    B
    `13 rad//s, 0.1m`
    C
    `14 rad//s, 0.05`
    D
    `10rad//s, 0.07`

  • thread from an elevator. The accelerating upward with unifo a. The work done by tension during t seconds is (u=0):

    A
    `m/2(g+a)at^2`
    B
    `m/2(g-a)at^2`
    C
    `m/2gat^2`
    D
    0

  • Assertion : The apparent weight of a body in an elevator moving with some downward acceleration is less than the actual weight of body. Reason : The part of the weight is spent in producing downward acceleration, when body is in elevator.

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

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    A barometer is kept in an elevator accelerating upwards at 4.9 m//s^(2) . If the barometer reads 77 cm of Hg, what will be the air pressure in the elevator?

    A spring of spring constant 200 N//m has a block of mass 1 kg hanging at its one end and form the other and the spring is attached to a celling of an elevator. The elevator rises upwards with an acceleration of g//3 . When acceleration is suddenly ceased , then what should be the angular frequency and elongationduring the time when the elevator is accelerating?

    Is Archimedes principle valid in an elevator accelerting up? In a car accelerating on a level road?

    A spring of force constant 200Nm^(-1) has a block of mass 10 kg hanging at its one end and the other end of the spring is attached to the celling of an elevator. The elevator is rising upwards with an acceleration of g/4 and the block is in equilibrium with respect to the elevator . when the acceleration of the elevator suddenly ceases , the block starts oscillating . What is the amplitude (in m) of these oscillations ?

    A person is standing in an elevator. In which situation he finds his weight less ?

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