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A wheel is rotating at 900 rpm about its axis.When the power is cut-off it comes to rest in 1 min.The angular retardation in rad sā»Ā² is
Options
(a) šĀ / 2
(b) šĀ / 4
(c) šĀ / 6
(d) šĀ / 8
Correct Answer:
šĀ / 2
Explanation:
w = 900 x 2Ļ/60 = 30Ļ
Angular Retardation = [final velocity – initial velocity] / time
= (30Ļ – 0)/60 = Ļ/2
Therefore, the angular retardation is Ļ/2.
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Topics: Motion in Plane
(93)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The half-life of radioactive element is 600 yr. The fraction of sample
- A boy standing at top of a tower of 20 m height drops a stone
- A long straight wire carries a certain current and produces a magnetic field
- The surface tension of soap solution is 0.03 N/m. The work done in blowing to form a soap
- A radiactive substance emits 100 beta particles in the first 2s and 50 beta
Topics: Motion in Plane (93)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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