ω rad/sec is the angular velocity of a crank whose radius is r. If it makes θ° with inner dead centre and obliquity of the connecting rod l is φ, the velocity v of the piston, is given by the equation_____.

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

Correct Answer :   ω(l sin φ + r cos φ tan θ)