Question

A sliding member AB has attached to a rocker BC, this BC is attached to crank CD. D is fixed end and as crank is rotating about D the slider slides parallel to it. What is the locus of point P on any point on the rocker?

(a) Ellipse

(b) Circle

(c) Line

(d) Semi-circle

This question was posed to me during an online interview.

I need to ask this question from Loci of Points by Different Methods in section Loci of Points & Orthographic Projections of Engineering Drawing

Answer 1

Correct option is (a) Ellipse

The best I can explain: The whole mechanism given here is a slider crank mechanism. The C traces the path of circle. But as the rocker has ends in which one is sliding and other is making circle the point on such a member will always trace the path ellipse.