In a Wilson-Hartnell type of governor, the mass of each flyball is 10 kg. The lengths of the flyball arm and the sleeve arm of each bell crank lever are 100 mm and 50 mm respectively. The stiffness of each of the two springs attached directly to the flyballs is 0.5 N/mm. The lever for the auxiliary spring is pivoted at its midpoint. When the radius of rotation is 100 mm, the equilibrium speed is 400 rpm. If the sleeve is lifted by 10 mm for an increase of speed of 10%, find the required stiffness of the auxiliary spring. Select one: A. 501 N/mm B. 201 N/mm C. 401 N/mm D. 301 N/mm
In a Wilson-Hartnell type of governor, the mass of each flyball is 10 kg. The lengths of the flyball arm and the sleeve arm of each bell crank lever are 100 mm and 50 mm respectively. The stiffness of each of the two springs attached directly to the flyballs is 0.5 N/mm. The lever for the auxiliary spring is pivoted at its midpoint. When the radius of rotation is 100 mm, the equilibrium speed is 400 rpm. If the sleeve is lifted by 10 mm for an increase of speed of 10%, find the required stiffness of the auxiliary spring. Select one: A. 501 N/mm B. 201 N/mm C. 401 N/mm D. 301 N/mm
International Edition---engineering Mechanics: Statics, 4th Edition
4th Edition
ISBN:9781305501607
Author:Andrew Pytel And Jaan Kiusalaas
Publisher:Andrew Pytel And Jaan Kiusalaas
Chapter7: Dry Friction
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In a Wilson-Hartnell type of governor, the mass of each flyball is 10 kg. The lengths of the flyball arm and the sleeve arm of each bell crank lever are 100 mm and 50 mm respectively. The stiffness of each of the two springs attached directly to the flyballs is 0.5 N/mm. The lever for the auxiliary spring is pivoted at its midpoint. When the radius of rotation is 100 mm, the equilibrium speed is 400 rpm.
If the sleeve is lifted by 10 mm for an increase of speed of 10%, find the required stiffness of the auxiliary spring.
Select one:
A.
501 N/mm
B.
201 N/mm
C.
401 N/mm
D.
301 N/mm
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