A disc rotating about its axis with angular speed is placed lightly {without any transnational push) on a perfectly friction-less table. The radius of the disc is R.What are the linear velocities of the point A, B and C on the disc shown in the Fig. B 7:2.60 ? Will the disc roll in the direction indicated ?

A disc rotating about its axis with angular speed is placed lightly {w

1.	A disc rotating about its axis with angular speed is placed lightly {without any transnational push) on a perfectly friction-less table. The radius of the disc is R.What are the linear velocities of the point A, B and C on the disc shown in the Fig. B 7:2.60 ? Will the disc roll in the direction indicated ?
Answer» SOLUTION :Let the origin of the COORDINATE system be taken as the centre of the disc. Linear speed of `A=R omega_(0)`Linear speed of `B=(-R) omega_(0) (-ve)`because B is below O) linear speed of `C=R//2 omega_(0)`. The table is FRICTIONLESS. So there is no FRICTION and hence the disc will not roll.