The spring stiffness of a Hartnell governor is determined by the change in centrifugal force acting on the balls and the corresponding change in sleeve lift, following the equation $\Delta F_c = k \Delta y$. The sleeve lift is related to the radius of rotation of the balls and the geometry of the bell crank lever.
In a Hartnell governor, the mass of each ball is 2.5 kg. Maximum and minimum centrifugal forces on the balls are 2000 N and 200 N corresponding to radii 20 cm and 15 cm respectively. The length of vertical and horizontal arms of the bell crank lever are same. Then, what will be the spring stiffness in N/cm ? - (5) Question not attempted
Asked in Assistant Eng. (Mechanical) Competitive Examination, 2023 · Topic: Mechanics (Rotational Dynamics and Moment of Inertia)
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