Q7.24Multiple choice
Two discs of moments of inertia I1 and I 2 about their respective axes (normal to the disc and passing through the centre), and rotating with angular speed ω1 and ω 2 are brought into contact face to face with their axes of rotation coincident.
- (a)Does the law of conservation of angular momentum apply to the situation? why?
- (b)Find the angular speed of the two-disc system.
- (c)Calculate the loss in kinetic energy of the system in the process.
- (d)Account for this loss.