Physics · 2020
JEE Main · 7 January 2020, Shift 2 · Q3
An elevator in a building can carry a maximum of 10 persons, with the average mass of each person being 68 kg. The mass of the elevator itself is 920…
An elevator in a building can carry a maximum of $\displaystyle 10$ persons, with the average mass of each person being $\displaystyle 68$ kg. The mass of the elevator itself is $\displaystyle 920$ kg and it moves with a constant speed of $\displaystyle 3$ m/s. The frictional force opposing the motion is $\displaystyle 6000$ N. If the elevator is moving up with its full capacity, the power delivered by the motor to the elevator ( $\displaystyle \mathrm{g}=10 \mathrm{~m} / \mathrm{s}^2$ ) must be at least :
Official answer
(4)
$\displaystyle 66000$ W
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JEE Main 2020 Physics question, with the answer from NTA’s final answer key. Where our answers come from.