Question

ABCD is a four bar mechanism in which AB = 310mm and CD = 450mm. AB and CD are both perpendicular to the fixed link AD. If the velocity of B at this condition is v. Then the velocity of C is

(a) v

(b) 2/3 v

(c) 3/2 v

(d) 9/4 v

This question was addressed to me by my school principal while I was bunking the class.

The question is from Linear Velocity topic in division Kinematics & Kinetics of Motion of Machine Kinematics

Answer 1

Right option is (c) 3/2 v

Easiest explanation: Velocity at C = CD/AB x velocity at B

                           = 450/310 x v

                           = 3/2 v