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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 work of 146 kJ is performed in order to compress one kilo mole fo gas adiabatically
- A nucleus disintegrates into two nuclear parts which have their velocities in the ratio
- The maximum kinetic energy of emitted electrons in a photoelectric effect
- Two capacitors of 10pF and 20pF are connected to 200V and 100V sources, respectively.
- By sucking through a straw, a student can reduce the pressure of his lungs
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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