A particle of mass m rotates with a uniform angular speed\[\omega \]. It is viewed from a frame rotating about the z-axis with a uniform angular velocity\[{{\omega }_{0}}\]. The centrifugal force on the particle is:

• A. \[m{{\omega }^{2}}r\]
• B. \[m{{\omega }^{2}}r\]
• C. \[m\left( \frac{\omega +{{\omega }_{0}}}{2} \right)a\]
• D. zero