JEE Advanced2007PhysicsRotational MotionActual
Paragraph: P _ 17 - 19 : Paragraph for Questions Nos. 17 to 19 Two discs A and B are mounted coaxially on a vertical axle. The discs have moments of inertia I and 2I, respectively about the common axis. Disc A is imparted an initial angular velocity 2 using the entire potential energy of a spring compressed by a distance x₁ . Disc B is imparted an angular velocity by a spring having the same spring constant and compr
Options
- AI ^2 2
- Bi ^2 3
- CI ^2 4
- DI ^2 6
Correct answer
B. i ^2 3
Step-by-step solution
Loss of kinetic energy =K_i-K_f aligned & = 1 2 I(2 )^2+ 1 2 (2 I)( )^2 - 1 2 (3 I) ( 4 3 )^2 & = 1 3 I ^2 aligned Option (b) is correct.