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The angular velocity of a wheel increases from 100 rps to 300 rps in 10 seconds. The number of revolutions made during that time is
Options
(a) 600
(b) 1500
(c) 1000
(d) 2000
Correct Answer:
2000
Explanation:
Assuming constant angular acceleration,
α=2πx300-2πx100/10
=2πx200/10
=40 π radius/s²
ω²f-ω²i=2α.θ
θ=4π²(90000-10000)/2×2πx20
=2π(80000)/40
=2πx2000
.·. Total number of revolutions=2000.
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Topics: Motion of system of Particles and Rigid Body
(73)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The time period of a mass suspended from a spring is T. If the spring is cut into four
- If Q, E and W denote respectively the heat added, change in internal energy
- If the rise in height of capillary of two tubes is 6.6 cm and 2.2 cm
- Two concentric coils each of radius equal to 2π cm are placed at right angles
- The wetability of a surface by a liquid depends primarily on
Topics: Motion of system of Particles and Rigid Body (73)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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Average rate = (100+300)/2 = 200 rotation per second
In 10 second rotation = 200×10=2000