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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.
Related Questions: - The interferance pattern is obtained with two coherent light sources of intensity
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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 interferance pattern is obtained with two coherent light sources of intensity
- Choose the correct statement
- Which one of the following statement is FALSE ?
- A train of mass 2x 10⁵ kg has a constant speed of 20 m/s up a hill inclined
- Masses of 3 wires of same metal are in the ratio 1:2:3 and their lengths
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