First slide

Angular velocity, Angular acceleration

Question

A circular disc is rotating about its own axis at a uniform angular velocity $ω$ The disc is subjected to uniform angular retardation by which its angular velocity is decreased to $\frac{ω}{2}$ during 120 rotations. The number of rotations further made by it before coming to rest is

Moderate

A

120
B

60
C

40
D

20

Solution

$α is constant, α = \frac{ω_{1}^{2} - ω_{2}^{2}}{2 θ}; θ_{2} = \frac{θ_{1}}{3}$

Get Instant Solutions

When in doubt download our app. Now available Google Play Store- Doubts App

Recieve an sms with download link

Doubts App

OR

SCAN ME

Doubts App

Doubts App