Question

If a man of weight W is standing in a lift moving upward with an acceleration a, then apparent weight of the man will be

• A. $W(1+\frac{a}{g})$
• B. $W(1-\frac{a}{g})$
• C. $W(1-\frac{a^2}{g^2})$
• D. None of these

Answer 1

The correct option is A $W(1+\frac{a}{g})$

As lift is accelerated upwards,

$R-mg=ma$

$R=mg+ma$

$R=mg(1+\frac{ma}{mg})$

$R=W(1+\frac{a}{g})$

So, Option A is correct.