Two discs of same moment of inertia rotating about their regular axis passing through center and perpendicular to the plane of disc with angular velocities ω1 and ω1. They are brought in to contact face to face coinciding the axis of rotation. The expression for loss of energy during this process is-
A. \(\frac {1}{4}\) I(ω1 – ω2)ω2
B. I(ω1 – ω2)ω2
C. \(\frac {1}{8}\) I(ω1 – ω2)ω2
D. \(\frac {1}{2}\) I(ω1 – ω2)ω2
Answer:A
Two discs of same moment of inertia rotating about their regular axis passing through center and perpendicular to the plane of disc with angular velocities ω1 and ω1. They are brought in to contact face to face coinciding the axis of rotation. The expression for loss of energy during this process is-
A. \(\frac {1}{4}\) I(ω1 – ω2)ω2 B. I(ω1 – ω2)ω2 C. \(\frac {1}{8}\) I(ω1 – ω2)ω2 D. \(\frac {1}{2}\) I(ω1 – ω2)ω2