A wheel is rotating at 900 rpm about its axis.When the power is cut-off it

⇦

⇨

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.

Related Questions:

1. Which of the following substances has the highest elasticity?
2. A spring has time period T. It is cut into n equal parts. The time period of each part
3. The half-life of a radioactive substance is 30 min. The time (in minutes) taken
4. In depletion layer of unbiased P-N junction
5. A series combination of n₁ capacitors, each of value C₁, is charged by a source

Topics: Motion in Plane (93)
Subject: Physics (2479)

---

Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score

18000+ students are using NEETLab to improve their score. What about you?

Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.

---

Share this page with your friends