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Q.
A boy of $50\, kg$ is standing in a left moving down with acceleration $ 9.8\,m/s^{2}$ . The apparent weight of the boy is:
Rajasthan PMTRajasthan PMT 2005Motion in a Straight Line
Solution:
Mass of the boy $m=50$
Acceleration of lift (downwards)
$a=9.8\, m / s ^{2}$
The apparent weight of the boy when the lift is moving downwards
$w=m(g-a)=50(9.8-9.8)=0$