8 9 What is the ratio of the moment of inertia of two rings radii r and nr about an axis perpendicular to their plane and passing through their centres 11 a. 1:2n^2 b. 2n^2:1 c. 1: n^2 d. n^2:1 A boy standing on a rotating disc stretches out his hands,the angular speed will a. Decrease b. Increase c. Will not change d. None of the above 10 A bullet of mass m moving with a speed v strikes a wooden block of mass M & gets embedded into the block. The final speed is a. -V b. C. d. m m+M m 2m+M m m+2M 2m m+M -V -V -V During inelastic collision between two bodies, Which of the following quantities always remain conserved. a. Total kinetic energy b. Total potential energy c. Total linear momentum d. None of the above