Question

Name the physical quantity which remains constant during change of state.

Answer 1

Answer:

The physical quantity which remains constant in uniform circular motion is Speed.

Explanation:

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 2

Answer:

Radical distance from centre of motion remains constant,and speed of the path it travelled in circular motion remains constant.these two conditions remains constant during change of state.