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NEET 2013
Exam
NEET
Year
2013
Subject
Physics
Chapter
Work, Power and Energy

NEET 2013 · Physics · Work, Power and Energy

One coolie takes 1 minute to raise a suitcase through a height of 2...

One coolie takes 1 minute to raise a suitcase through a height of 2 m2 \mathrm{~m} but the second coolie takes 30 s30 \mathrm{~s} to raise the same suitcase to the same height. The power two coolies are in the ratio

Options

  1. A1:31: 3
  2. B2:12: 1
  3. C3:13: 1
  4. D1:21: 2

Correct answer

D. 1:21: 2

Step-by-step solution

We know that  Power = Work done  Time \text{ Power }=\frac{\text{ Work done }}{\text{ Time }} Work done =mgh=m g h is same in both the case ∴P1P2=f2f1=30sec1 min=12\therefore \frac{\mathrm{P}_1}{\mathrm{P}_2}=\frac{f_2}{f_1}=\frac{30 \mathrm{sec}}{1 \mathrm{~min}}=\frac{1}{2}
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