When an object moves in the circular path at the same speed then its speed is called -

Question

Prepp Team · Accepted Answer

Understanding Motion in a Circular Path

When an object moves in a circular path, its direction of motion is constantly changing. Speed is the magnitude of velocity. Velocity is a vector quantity that includes both speed and direction.

Analyzing the Question: Constant Speed in a Circular Path

The question specifically asks about the scenario where an object is moving in a circular path and maintains the same speed. This means the magnitude of its velocity remains constant, but its direction is always changing because it is following a circle.

Evaluating the Options

Let's look at the given options and see which one correctly describes this type of motion:

Uniform Circular Speed: This term describes motion in a circular path where the speed of the object is constant. 'Uniform' implies constant or unchanging, 'circular' indicates the path is a circle, and 'speed' refers to the magnitude of velocity. This perfectly matches the description in the question.
Uniform Linear Motion: Linear motion means movement along a straight line. Uniform linear motion implies constant velocity (both speed and direction) along a straight path. Since the object is moving in a circular path, this option is incorrect.
Uniform Acceleration: Acceleration is the rate of change of velocity. In circular motion, even if the speed is constant, the direction of velocity is changing. A change in direction means there is acceleration (specifically, centripetal acceleration directed towards the center of the circle). If the acceleration were uniform (constant in both magnitude and direction), the object would move in a straight line or a parabolic path, not a circle at constant speed. So, this option is incorrect.
Semicircular motion: This term describes motion along a path that is half of a circle. While it involves movement along a curved path, it doesn't specify anything about the speed being constant. The question is about circular motion (a full circle) and constant speed. This option is too specific to a part of a circle and doesn't fully capture the concept of constant speed in a complete circular path compared to the first option.

Conclusion on Circular Path Motion

Based on the analysis, the term that accurately describes an object moving in a circular path at the same speed is Uniform Circular Speed.

Term	Description	Applies to Question Scenario?
Uniform Circular Speed	Motion in a circular path with constant speed.	Yes
Uniform Linear Motion	Motion in a straight line with constant velocity.	No (path is circular)
Uniform Acceleration	Constant acceleration (magnitude and direction).	No (acceleration direction changes in circular motion)
Semicircular motion	Motion along a half-circle path.	No (question is about circular path, not just a part, and doesn't guarantee constant speed)

Therefore, when an object moves in a circular path at the same speed, it is known as Uniform Circular Speed.

Revision Table: Key Concepts in Motion

Concept	Definition
Speed	The rate at which an object covers distance (magnitude of velocity).
Velocity	Speed in a given direction (vector quantity).
Acceleration	The rate of change of velocity.
Uniform Speed	Speed that does not change over time.
Uniform Velocity	Velocity that does not change over time (constant speed and direction).
Circular Motion	Motion along the circumference of a circle.

Additional Information: Uniform Circular Motion vs. Uniform Circular Speed

It is important to distinguish between Uniform Circular Speed and Uniform Circular Motion.

Uniform Circular Speed refers specifically to the speed being constant while moving in a circle.
Uniform Circular Motion usually implies motion in a circular path at a constant speed. However, because the direction of velocity is always changing, the velocity itself is not constant. Therefore, there is always an acceleration (centripetal acceleration) in uniform circular motion, even if the speed is constant. The term "Uniform Circular Speed" focuses purely on the constancy of the speed component, aligning directly with the question's phrasing.

In many contexts, "Uniform Circular Motion" is used to mean circular motion at constant speed, implying constant speed but changing velocity and thus acceleration. The option "Uniform Circular Speed" specifically highlights the constant speed aspect, which is exactly what the question asks about.