Q. 'w' rad/sec is the sngular velocity of a crank whose radius is 'r'. If it makes θwith inner dead centre and obliquity of the connecting rod '1' is 'φ' the velocity v of the piston, is given by the equation

• (A) ω2 (l cos φ + r sin φ tan θ)
• (B) ω2 (l sin φ + r cos Φ tan θ)
• (C) ωl sin φ + r cos φ tan θ)
• (D) ω2 (l sin φ - r cos θ tan )