MHT CET202410 May 2024Morning ShiftPhysicsRotational MotionActual
A ring and a disc roll on horizontal surface without slipping with same linear velocity. If both have same mass and total kinetic energy of the ring is 6 J then total kinetic energy of the disc is
Options
- A3 2 ~J
- B5 2 ~J
- C7 2 ~J
- D9 2 ~J
Correct answer
D. 9 2 ~J
Step-by-step solution
Total (K . E)_ ring =M v^2 ...(i) Total (K.E) disc = 3 4 Mv ^2 ...(ii) Dividing equation (ii) by equation (i) aligned & ( K E )_ disc ( K . E )_ ring = 3 4 Mv ^2 Mv ^2 & ( ~K . E )_ disc =( K . E )_ ring 3 4 =6 3 4 = 9 2 ~J aligned