A disc is rotating with =10rad/s about a fixed central axis which is perpendicular to its plane. The disc has a mass =2kg & radius =10cm. A small particle of mass 100gm is put slowly on the disc s outer circumference. There is sufficient friction between the disc and the particle. What will be the new angular velocity of the system?

Can t conserve angular momentum because of friction

A disc is rotating with =10rad/s about a fixed central axis which is

1.	A disc is rotating with =10rad/s about a fixed central axis which is perpendicular to its plane. The disc has a mass =2kg & radius =10cm. A small particle of mass 100gm is put slowly on the disc s outer circumference. There is sufficient friction between the disc and the particle. What will be the new angular velocity of the system?
A.	10 rad/s
B.	9.09 rad/s
C.	9.51 rad/s
D.	Can t conserve angular momentum because of friction
Answer» C. 9.51 rad/s

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