Question

Which of the following statement represents one-dimensional motion?

• A. A stone falling down vertically.
• B. A body moving along a curved path.
• C. A body moving in space.
• D. A train moving in a zigzag path.

Answer 1

The correct option is A

A stone falling down vertically.

When a body moves along a straight line path, its motion is said to be one-dimensional motion. It is also called motion in a straight line or rectilinear motion. A stone falling down vertically is one-dimensional motion. In such a motion, there is no movement of the body in the lateral direction. If a body moves along a curved path, its motion is two dimensional and if it moves in space, its motion is three dimensional.