Two solid semi-circular disks fo equal masses `m=10 kg` collide and stick together. Their initial velocities are shown initially not rotating. The combined object is a circular disk of radius `0.1 m` it is spinning with an angular velocity `omega=10rad//s`. how much mechanical energy (in `J`) is lost in collision ?

Answer

1

Explanation

Final `upsilon` by momentum consevative
`upsilon_(f)=5, omega=10, K_(1)=900 J, K_(f)=250+5`
`Deltak=900-255=645 J`