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
- A2
- B1 2
- C2
- D1 2
Correct answer
C. 2
Step-by-step solution
aligned 1 2 I(2 )^2 & = 1 2 k x₁^2 1 2 (2 I)( )^2 & = 1 2 k x₂^2 aligned From Eqs. (i) and (ii), we have x₁ x₂ = 2 Option (c) is correct.