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A man of mass 70 kg stands on a weighing...

A man of mass 70 kg stands on a weighing machine in a lift , which is moving (a) upwards with a unifrom speed of `10^(-1)` (b) downwards with a unifrom acceleration of `5 ms^(-2)`
(c) upwards with a unifrom acceleration of `ms^(-2)` What would be th readings on the scale in each case ?
(d) What would be the reading if the lift machanism failed and it hurtled down freely under gravity ?

Text Solution

AI Generated Solution

To solve the problem step-by-step, we will analyze the situation in each case and use the appropriate formulas to find the readings on the weighing machine. ### Given: - Mass of the man, \( m = 70 \, \text{kg} \) - Acceleration due to gravity, \( g \approx 10 \, \text{m/s}^2 \) ### (a) Lift moving upwards with a uniform speed of \( 10 \, \text{m/s} \) ...
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Knowledge Check

  • A man of mass 70 kg stands on a weighing scale in a lift which is moving downward with the uniform acceleration of 5 m/s^2 . The reading on the weighing scale is

    A
    70 kg
    B
    35 kg
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    105 kg
    D
    700 kg

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    `400N`
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    `800N`
    C
    `1200N`
    D
    Zero

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    A
    50kg
    B
    60kg
    C
    96kg
    D
    176kg

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