For a governor, if FC is the controlling force, r is the radius of rotation of the balls, the stability of the governor will be ensured when

For a governor, if FC is the controlling force, r is the radius of rot

1.	For a governor, if F_C is the controlling force, r is the radius of rotation of the balls, the stability of the governor will be ensured when
A.	dF<sub>C</sub> /dr > F<sub>C</sub>/r
B.	dF<sub>C</sub> /dr < F<sub>C</sub> /r
C.	dF<sub>C</sub> /dr = 0
D.	none of the mentioned
Answer» B. dF<sub>C</sub> /dr < F<sub>C</sub> /r