First slide

Torque

Question

Figure shows a flywheel of radius 10 cm. Its moment of inertia about the rotation axis is 0.4 kg-m². A massless string passes over the flywheel and a mass 2kg is attached at its lower end. Angular acceleration of the pulley is nearly

Moderate

A

4.8 rad/s²
B

6.2 rad/s²
C

3.2 rad/s²
D

9.6 rad/s²

Solution

For block, mg - T = ma
For pulley, TR $= Iα$
$\begin{array}{ll} \Rightarrow a = \frac{mg}{m + I / R^{2}} \\ and α = \frac{a}{R} \end{array}$

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