Q100 / 180 · NEET 2013 (Karnataka) · Physics

One coolie takes 1 minute to raise a suitcase through a height of $2 \mathrm{~m}$ but the second coolie takes $30 \mathrm{~s}$ to raise the same suitcase to the same height. The power two coolies are in the ratio

  • A
    $1: 3$
  • B
    $2: 1$
  • C
    $3: 1$
  • Correct answer
    D
    $1: 2$

Solution

We know that $$ \text { Power }=\frac{\text { Work done }}{\text { Time }} $$ Work done $=m g h$ is same in both the case $$ \therefore \frac{\mathrm{P}_1}{\mathrm{P}_2}=\frac{f_2}{f_1}=\frac{30 \mathrm{sec}}{1 \mathrm{~min}}=\frac{1}{2} $$

Hence, the correct answer is option: 'D'.

Relevant Questions