Q.Define two dimensional motion.

Two dimensional motion is motion confined to a plane, described using two coordinates such as x and y.

In one dimensional motion, a particle moves along a single straight line, and only one coordinate is needed to fix its position at any time. In two dimensional motion, the particle moves in a plane (a flat 2-D surface), and TWO coordinates — usually x and y, or equivalently a position vector r = x i + y j — are needed to specify its location at any instant.

In two dimensional motion, the velocity and acceleration of the particle need not point along the same line; the direction of motion can change continuously. Classic examples are:

• Projectile motion (a ball thrown at an angle to the horizontal follows a parabolic path in a vertical plane). …