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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
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Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- An automobile moves on a road with a speed of 54 km h⁻¹. The radius of its wheels
- Equal currents are passing through two very long and straight parallel wires
- ₉₂U²³⁵ undergoes successive disintegrations with the end product of ₈₂P²⁰³
- The time by a photoelectron to come out after the photon strikes is approximately
- The escape velocity of a body from earth’s surface is Ve. The escape velocity
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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