Which physical quantity remain constant in uniform circular motion?
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The physical quantity which remains constant in uniform circular motion is Speed.
Uniform circular motion means that the body is moving along a circular path with constant speed.
At each point, it's direction of motion is tangential to the path. So, the direction of velocity keeps changing. So velocity cannot be constant, as velocity is a vector quantity.
As the velocity is changing its direction, there must be some net acceleration. This acceleration is called the Centripetal Acceleration, and is always directed towards the centre of the circle.
This acceleration is also not constant, as it's direction keeps changing.
So, only the speed remains constant.
Uniform circular motion means that the body is moving along a circular path with constant speed.
At each point, it's direction of motion is tangential to the path. So, the direction of velocity keeps changing. So velocity cannot be constant, as velocity is a vector quantity.
As the velocity is changing its direction, there must be some net acceleration. This acceleration is called the Centripetal Acceleration, and is always directed towards the centre of the circle.
This acceleration is also not constant, as it's direction keeps changing.
So, only the speed remains constant.
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Answer:
speed
Explanation:
Speed
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