In a reciprocating steam engine, when the crank has turned from inner dead centre through an angle , the angular velocity of the connecting rod is given by

• A. <img src="/_files/images/mechanical-engineering/theory-of-machines/496-287-1.png">
• B. <img src="/_files/images/mechanical-engineering/theory-of-machines/496-287-2.png">
• C. <img src="/_files/images/mechanical-engineering/theory-of-machines/496-287-3.png">
• D. <img src="/_files/images/mechanical-engineering/theory-of-machines/496-287-4.png">