Question Answers

Sahay Sir > Question Answers > NCERT Exemplar Class 11 > Physics > Chapter 6 - System of Particles and Rotational Motion > A disc rotating about its axis with angular speed ωo is placed lightly (without any translational push) on a perfectly frictionless table. The radius of the disc is R. What are the linear velocities of the points A, B and C on the disc shown in Fig. 7.41? Will the disc roll in the direction indicated?

A disc rotating about its axis with angular speed ωo is placed lightly (without any translational push) on a perfectly frictionless table. The radius of the disc is R. What are the linear velocities of the points A, B and C on the disc shown in Fig. 7.41? Will the disc roll in the direction indicated?

A hoop of radius 2m weight 100kg. It rolls along a horizontal floor so that its centre of mass has a speed of 20cms^−1. How much work has to be done to stop it ?