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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 s⁻² is
Options
(a) 𝜋 / 2
(b) 𝜋 / 4
(c) 𝜋 / 6
(d) 𝜋 / 8
Correct Answer:
𝜋 / 2
Explanation:
w = 900 x 2π/60 = 30π
Angular Retardation = [final velocity – initial velocity] / time
= (30π – 0)/60 = π/2
Therefore, the angular retardation is π/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
- A metal wire of circular cross-section has a resistance R₁. The wire is now stretched
- A thin film of soap solution (n=1.4) lies on the top of a glass plate (n=1.5).
- In insulators (CB is Conduction Band and VB is Valence Band)
- If r be the distance of a point on the axis of a magnetic dipole from its centre
- Photons with energy 5eV are incident on a cathode C in a photoelectric cell.
Topics: Motion in Plane (93)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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