Navigate

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.

admin:

Related Questions

  1. A voltmeter of range 2 V and resistance 300Ω cannot be converted into ammeter
  2. A particle doing SHM has amplitude=4 cm and time period = 12 sec. The ratio between times
  3. A body initially at rest is moving with uniform acceleration a m/s²
  4. A particle of unit mass undergoes one-dimensional motion such that its velocity varies
  5. A boat of anchor is rocked by waves whose crests are 100 m apart and velocity