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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
- Eight drops of a liquid of density ρ and each of radius a are falling through air
- For inelastic collision between two spherical rigid bodies
- A battery of emf 10 V and internal resistance 3 ohm is connected to a resistor.
- An experiment takes 10 minutes to raise temperature of water from 0⁰C to 100⁰C
- A cell of emf E and internal resistance r supplies current for the same time
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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