π (r₁ + r₂) + (r₁ + r₂)²/x + 2x

π (r₁ + r₂) + (r₁ - r₂)²/x + 2x

π (r₁ - r₂) + (r₁ - r₂)²/x + 2x

π (r₁ - r₂) + (r₁ + r₂)²/x + 2x

**The acceleration of the particle moving with simple harmonic motion is _________ at the mean position.****Two pulleys of radii r₁ and r₂ and at distance x apart are connected by means of a cross…****The coefficient of fluctuation of speed is __________ of maximum fluctuation of speed and the mean speed.****When the crank is at the inner dead centre, in a reciprocating steam engine, then the velocity of the…****In railway axle boxes, the bearing used is****A shaft has two heavy rotors mounted on it. The transverse natural frequencies, considering each of…****Which of the following statement is correct as regard to the difference between a machine and a structure?****A disturbing mass m₁ attached to the rotating shaft may be balanced by a single mass m₂…****In a four-bar chain it is required to give an oscillatory motion to the follower for a continuous rotation…****The rotating shafts tend to vibrate violently at whirling speeds because****In a mechanism, usually one link is fixed. If the fixed link is changed in a kinematic chain, then relative…****In a drag link quick return mechanism, the shortest link is always fixed. The sum of the shortest and…****In vibration isolation system, if ω/ωn > 1, then the phase difference between the transmitted…****The number of links and instantaneous centers in a reciprocating engine mechanism are****Instantaneous center of rotation of a link in a four bar mechanism lies on****In a differential band brake as shown in the below figure, the drum rotates anticlockwise and the greater…****Angle of dwell of cam is defined as the angle****The rotor of a ship rotates in clockwise direction when viewed from stern and the ship takes a left…****Oldhams coupling is an inversion of the kinematic chain used in****A spring controlled governor is said to be unstable when the controlling force****A torsional system with discs of moment of inertia I₁ and I₂ as shown in the below figure,…****A kinematic chain is known as a mechanism when****Efficiency of a screw jack is given by****In gears, interference takes place when****A point on a connecting link (excluding end points) of a double slider crank mechanism traces a****When a rigid body is suspended vertically and it oscillates with a small amplitude under the action…****When the belt is stationary, it is subjected to some tension known as initial tension. The value of…****Which one of the following is an exact straight line mechanism using lower pairs?****Coriolis component acts****The stress induced in a body will be shear stress, when it is subjected to**