(1/2) μ W (r₁ + r₂)

(2/3) μ W (r₁ + r₂)

(1/2) μ W [(r₁³ - r₂³)/(r₁² - r₂²)]

(2/3) μ W [(r₁³ - r₂³)/(r₁² - r₂²)]

**The total number of instantaneous centres for a mechanism consisting of n links are****When the sleeve of a Porter governor moves downwards, the governor speed****Which gear train is used for higher velocity ratios in a small space?****The maximum efficiency of a screw jack is****Which of the following statement is correct?****The velocity of the belt for maximum power is (where m = Mass of the belt in kg per metre length)****The centre of percussion is below the centre of gravity of the body and is at a distance equal to****It is required to connect two parallel shafts, the distance between whose axes is small and variable.…****Kinematic pairs are those which have****The velocity of sliding __________ the distance of the point of contact from the pitch point.****The minimum force required to slide a body of weight W on a rough horizontal plane is****In a disc clutch, if there are n₁ number of discs on the driving shaft and n₂ number of…****Which of the following would constitute a link?****Angle of dwell of cam is defined as the angle****In a cone pulley, if the sum of radii of the pulleys on the driving and driven shafts is Constant, then****In under damped vibrating system, if x₁ and x₂ are the successive values of the amplitude…****The steering of a ship means****ABCD is a four bar mechanism in which AB = 310 mm and CD = 450 mm. AB and CD are both perpendicular…****A mechanism __________ for transmitting or transforming motion.****In a hydrodynamic journal bearing, there is****Which type of gearing is used in steering system of an automobile?****The height of a Watt's governor is****Klein's construction can be used to determine acceleration of various parts when the crank is at****What is the number of instantaneous centres for an eight link mechanism?****When the crank is at the outer dead centre, in a reciprocating steam engine, then the acceleration of…****Frequency of vibrations is usually expressed in****In a Hartnell governor, the stiffness of the spring is given by (where S1 and S2 = Spring forces exerted…****The equation of motion for a vibrating system with viscous damping is (d²x/dt²) + (c/m). (dx/dt)…****Power of a governor is the****In a drag link quick return mechanism, the shortest link is always fixed. The sum of the shortest and…**