Leads the sliding velocity vector by 90°

Lags the sliding velocity vector by 90°

Is along the sliding velocity vector

Leads the sliding velocity vector by 180°

**Frequency of vibrations is usually expressed in****The minimum number of teeth on the pinion which will mesh with any gear without interference for 20°…****In gears, interference takes place when****The coefficient of fluctuation of speed is __________ of maximum fluctuation of speed and the mean speed.****The velocity of the belt for maximum power is (where m = Mass of the belt in kg per metre length)****The mechanism in which two are turning pairs and two are sliding pairs, is called a****The lead screw of a lathe with nut forms a****When the radius of rotation of balls __________ as the equilibrium speed increases, the governor is…****A watt's governor can work satisfactorily at speeds from****If two moving elements have surface contact in motion, such pair is known as****Which of the following is an open pair?****The axis of precession is __________ to the plane in which the axis of spin is going to rotate.****For high speed engines, the cam follower should move with****In multi V-belt transmission, if one of the belt is broken, we have to change the****The secondary unbalanced force due to inertia of reciprocating parts in a reciprocating engine is given…****When the relation between the controlling force (Fc) and radius of rotation (r) for a spring controlled…****The velocity of sliding of meshing gear teeth is (Where ω₁ and ω₂ are angular…****The two links OA and OB are connected by a pin joint at O. If the link OA turns with angular velocity…****In a drag link quick return mechanism, the shortest link is always fixed. The sum of the shortest and…****A typewriter mechanism has 7 numbers of binary joints, six links and none of higher pairs. The mechanism…****The lower pairs are __________ pairs.****Which of the following is a higher pair?****Which gear is used for connecting two coplanar and intersecting shafts?****Shaft revolving in a bearing is the following type of pair****Power of a governor is the****The maximum velocity of a particle moving with simple harmonic motion is****In a steam engine, one method of obtaining the earlier cut-off with a simple slide valve is by increasing…****Two pulleys of radii r₁ and r₂ and at distance x apart are connected by means of an open…****When two links are connected by a pin joint, their instantaneous centre lies****The number of links in pantograph mechanism is equal to**