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Question

# A person stands on a weighing machine kept on the floor of an elevator, if the elevator moves upward with a constant acceleration, the apparent weight of the person

A
is less than their true weight
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B
is equal to their true weight
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C
is more than their true weight
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D
can be more or less than their true weight
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Solution

## The correct option is B is more than their true weightWhen a person stand on an elevator moving upwards with acceleration a, he will experience a downward gravitational force equal to mg and a downward pseudo force equal to ma. We know that a weighing machine measures the net downward force ⇒Fnetdownwards=mg+maThis means the net downward force exerted by the person on the weighing machine will increase by an amount ma and the apparent weight of the person will become more than his true weight Hence correct answer is option C

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