L31 : 3- D Kinematics

In this lecture, we will study the motion of rigid bodies in three dimensional space. We start the lecture by discussing different types of motions.

(1) Translation :

There are two types of translation:

(A) Rectilinear Translation : In this translation any two points in the body will move along parallel straight lines.

(B) Curvilinear Translation: In this translation, two points in the body will move along congruent curves.

In either case, everyline in the body remains parallel to its original position.

In either case, everyline in the body remains parallel to its original position.

For example, in the animation below, the cube is undergoing a translation along a curve. A line on the face of the cube always remains parallel to itself.