Question

When a slider moves on a fixed link having curved surface, their instantaneous centre lies

(a) on their point of contact

(b) at the centre of curvature

(c) at the centre of circle

(d) at the pin joint

This question was posed to me in quiz.

My question is from Number of Degrees of Freedom for Plane Mechanisms topic in portion Simple Mechanisms of Machine Kinematics

Answer 1

Right option is (b) at the centre of curvature

The explanation is: When a slider moves on a fixed link having curved surface, their instantaneous centre lies at the centre of curvature.

When a slider moves on a fixed link having straight surface their instantaneous center lies at infinity.