Chapter 8

basic circular motion formula Acceleration in the Slider Crank Mechanism A slider crank mechanism is shown in Fig. 8.3 (a). Let the crank OB makes an angle θ with the inner dead centre (I.D.C) and rotates in a clockwise direction about the fixed point O with uniform angular velocity ωBO rad/s. ∴ Velocity of B with respect to O or velocity of B (because O is a fixed point), vBO = vB = ωBO × OB , acting tangentially at B . We know that centripetal or radial acceleration of B with respect to O or acceleration of B (because O is a fixed point), v2 aBO = aB = ωBO × OB =

                                                       OB

Note : A point at the end of a link which moves with constant angular velocity has no tangential component of acceleration.