A small solid sphere of mass 1 kg rolls without slipping on a rough stationary track with initial linear speed v = √(200/7) m/s and leaves the inclined plane at point C as shown.

Question

G1 Physics · Accepted Answer

For the solid sphere, rolling kinetic energy is K=½mv²+½(2mr²/5)(v²/r²)=7mv²/10. Use mechanical-energy conservation on the track. After the sphere leaves C, its angular speed remains constant while gravity changes only its translational speed.