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an elevator starts from rest with a constant upward accelaration. it moves 2m in thefirst 0.6 sec. a passanger in the elevator is holding a 3kg package by a verticle string. when the elevator is moving, what is the tension in the string?
let the acceleration of the lift be a then 2=0*t +(1/2)at2 so, a=4/t2 = 400/36 =100/9 now as the lift is moving upwards ,so a pseudo force acts on the package in the downward direction and its magnitude =3*(100/3) =100/3also the weight of the package acts downwards =3*g = 30newton ia have taken g=10m/s2 so, tension is balanced by pseudo force +weight so, tension = 30 +(100/3) newton
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