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The apparent weight of man inside a lift...

The apparent weight of man inside a lift moving up with certain acceleration is 600N. When the lift is coming down with the same acceleration apparent weight is found to be 200N.The mass of the man is ?(g=10m`s^(-2)`)

Answer

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The apparent weight of a man in a lift is W_(1) when lift moves upwards with some acceleration and is W_(2) when it is accerating down with same acceleration. Find the true weight of the man and acceleration of lift .

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Knowledge Check

  • The weight of a man in a lift moving upwards with an acceleration 'a' is 600 N. When the lift moves downwards with the same acceleration his weight is found to be 360 N. The real weight of the man is

    A
    380 N
    B
    600 N
    C
    480 N
    D
    700 N

  • The apparent weight of man in a lift is less the real weight when :

    A
    the lift is going up with an acceleration
    B
    the lift is going down with uniform speed
    C
    the lift is going up with uniform speed
    D
    the lift is going down with an acceleration

  • A lift is moving up with an acceleration of 3.675 m//sec_(2) . The weight of a man-

    A
    increases by `37.5%`
    B
    decreases by`37.5%`
    C
    increases by `137.5%`
    D
    remains the same

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