What is two dimensional motion❓ one min concept

Projectile motion is a two dimensional motion with constant acceleration. Is this statement true or false?

Show the position vector for a particle in two dimensional motion. Write an expressionfor this position vector.

What is the two-dimensional coordination number of a molecule in square close-packed layer?

State in the following cases, whether the motion is one, two or three dimensional motion is one, two or three dimesional motion: (a) a dite fluing onwindy day (b) a speeding car on a long straight high way (c ) a carrom coin rebounding from the side if the board (d) a plane revolving around its star.

For a particle in one dimensional motion, the instantaeous speed is always equal to the magnitude of instantaneous velocity. Why ?

In a two dimensional motion of a body, prove that tangentiol acceleration is nothing but component of acceleration along velocity.

The velocity-time graph of a particle in one-dimensional motion is shown in the figure. Which of the following formulae is correct for describing the motion of the particle over the time interval t_1 to t_2 ?