In uniform circular motion, which of the following quantities remains constant?

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Question: In uniform circular motion, which of the following quantities remains constant?

Options:

Correct Answer: Speed

Solution:

In uniform circular motion, the speed remains constant, but velocity and acceleration change direction.

In uniform circular motion, which of the following quantities remains constant?

In uniform circular motion, which of the following quantities remains constant?

Step 1: Understand what uniform circular motion means. It is when an object moves in a circle at a constant speed.
Step 2: Identify the key quantities involved: speed, velocity, and acceleration.
Step 3: Recognize that speed is the distance traveled per unit of time and remains constant in uniform circular motion.
Step 4: Understand that velocity includes both speed and direction. Since the direction of the object is constantly changing in a circle, the velocity is not constant.
Step 5: Know that acceleration is the change in velocity over time. In circular motion, the direction of the velocity changes, so the acceleration also changes direction.
Step 6: Conclude that in uniform circular motion, the only quantity that remains constant is speed.

Uniform Circular Motion – In uniform circular motion, an object moves in a circular path at a constant speed, but its velocity changes due to the continuous change in direction.
Speed vs. Velocity – Speed is a scalar quantity that remains constant in uniform circular motion, while velocity is a vector quantity that changes due to direction change.
Acceleration in Circular Motion – In uniform circular motion, the acceleration (centripetal acceleration) is directed towards the center of the circle and changes direction, even though its magnitude remains constant.