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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
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Subject: Physics
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Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The horizontal range and maximum height attained by a projectile are R and H,respectively
- A bus is moving with a speed of 10 ms⁻¹ on a straight road
- Electrons in a certain energy level n=n₁, can emit 3 spectral lines. When they
- If sink is at a temperature of -39⁰C and source at 0⁰C, then efficiency will be
- A photon of wavelength 300nm interacts with a stationary hydrogen atom in ground
Topics: Motion in Plane (93)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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