For an isochronous Hartnell governor (where r1 and r2 = Maximum and minimum radius of rotation of balls respectively, S1 and S2 = Maximum and minimum force exerted on the sleeve respectively, and M = Mass on the sleeve)

• A. <img src="/_files/images/mechanical-engineering/theory-of-machines/503-358-1.png">
• B. <img src="/_files/images/mechanical-engineering/theory-of-machines/503-358-2.png">
• C. <img src="/_files/images/mechanical-engineering/theory-of-machines/503-358-3.png">
• D. <img src="/_files/images/mechanical-engineering/theory-of-machines/503-358-4.png">