Question

a lady weighing 60 kg is standing in an elevator. If the elevator moves upward with an acceleration of 2ms{2}. what is the reading of the weighing machine [ take g= 10m/s{-2}

Answer 1

The reading of the weighing machine is 720 N.

Explanation:

Given that,

Mass of the lady, m = 60 kg

Acceleration of the elevator, $a=2\ m/s^2$

When the elevator is moving upward, the net force acting on it is given by :

$F-mg=ma$

$F=m(g+a)$

$F=60\times (10+2)$

F = 720 N

So, the reading of the weighing machine is 720 N.

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Topic : Second law of motion

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