A disc is rotating with ω =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:B
A disc is rotating with ω =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