10 Block 1 of mass m is moving with speed u to the right on

Last updated: 6/9/2023

10 Block 1 of mass m is moving with speed u to the right on a horizontal surface of negligible friction as shown in the figure Block 1 makes an elastic head on collision with block 2 of mass 2m which is at rest Which of the following are correct velocities v and v for blocks 1 and 2 respectively immediately after the collision A v v and v U C v 0 and v E v E F A P 1 20 C 0 E 60 and U 1 201 M B v v and v D v v 11 A figure skater is spinning with her arms outstretched such that her rotational inertia is I She is spinning with an angular speed She pulls in her arms such that her rotational inertia reduces to I Her new angular speed will be 3 v and v B 2 v U D 300 12 A wheel of radius 15 cm has a rotational inertia of 2 3 kg m The wheel is spinning at a rate of 6 5 revolutions per second A frictional force is applied tangentially to the wheel to bring it to a stop The work done by the torque to stop the wheel is most nearly A zero C 100 I E 3840 J B 50 J D 1920