Two discs of moment of inertia I 1 and I 2 and angular speeds 
are rotating along collinear axes passing through their centre of mass and perpendicular to their plane. If the two are made to rotate together along the same axis the rotational KE of system will be
A
B
C
D
None of these
Text Solution
Verified by ExpertsThe correct answer is:
C
By the law of conservation of angular momentum 
Angular velocity of system 
Rotational kinetic energy 
.
Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems
A solid uniform cylinder of mass m , radius R is placed on a plane inclined at angle θ relative to …
The velocities of three particles of masses 20 g , 30 g and 50 g are respectively. The velocity of…
Masses are placed at the corners respectively of a square of diagonal . The distance of centre …
The coordinates of the positions of particles of mass are and respectively. The position of the …
Angular displacement of a flywheel varies with time as then angular acceleration is given by
A wheel completes 2000 rotations in covering a distance of . The diameter of the wheel is