State whether the given statement is True or False.
Projectile motion is a 3-dimensional motion.
A) True
B) False

Hint: Here, in this question we can conclude with the correctness of the statement, if we know about the Projectile motion and about the motions in different dimensions. The answer of the given question is purely based on the knowledge of dimensions and projectile motion. If we know these concepts, then easily we can conclude with the answer.

Complete answer:
First of all let us find out the projectile motion.
Now, when we throw or project an object into the air in such a way that only acceleration due to gravity is acting on it, then in that case the motion of the body will be referred to as projectile motion. The path that the object follows during the motion is known as the trajectory of the object.

The projectile motion in step one it can be seen that the motion of the object will be only in ‘x’ and ‘y’ direction. From this we can conclude that a projectile motion is an example of two dimensional motion, as the motion is only in two dimensions, i.e. horizontal and vertical.Therefore, the above statement is not correct.

Hence, option (B), i.e. False is the correct choice for the given question.

Note: One dimensional motion: When an object moves along a straight path, then its motion is known as one dimensional motion.
Two dimensional motion: When an object moves in two different directions at a point w.r.t, then the motion is known as two dimensional motion.
Three dimensional motion: When an object moves in three different directions at a point w.r.t, then the motion of the object is known as three dimensional motion.