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One coolie takes 1 minute to raise a suitcase through a height of 2 m but the second coolie takes 30 s to raise the same suitcase to the same height. The powers of two coolies are in the ratio of
Options
(a) 1 : 2
(b) 1 : 3
(c) 2 : 1
(d) 3 : 1
Correct Answer:
1 : 2
Explanation:
power P = w / t
P₁ / P₂ = t₂ / t₁ = 30s / 1 minute = 30s / 60s = 1/2
(t₁ = 1 minute ; t₂ = 30 second given)
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Topics: Work Energy and Power
(94)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The half-life of a radioactive substance is 30 min. The time (in minutes) taken
- A boat of mass 40 kg is at rest.A dog of mass 4 kg moves in the boat
- A uniform force of (3i + j) newton acfs on a particle of mass 2kg
- A generator at a utility company produces 100 A of current at 4000 V. The voltage
- A source of unknown frequency gives 4 beats/s, when sounded with a source harmonic
Topics: Work Energy and Power (94)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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