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# Fixity is always needed for rotational motion?

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Yes for pure rotation, the distance between two particles will always remain constant.

No, it's not always needed.

No, fixity has no meaning for rotational motion.

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No. Not required. It is independent of rotational motion.

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No, not always there are certain conditions in which it will be.

Yes, it is very important.

Yes, for example, wind fan generates electricity from fixity. So fixity is more needed for rotational motion.

Passionate mathematics teacher with a degree in Electronics

No, the axis of rotation can be either stationary or moving.But when the axis is moving, we can analyse the movement of axis and rotation around the axis (as if the axis is stationary) separately. Then we can combine both results. So studying the rotation around a fixed axis is essential.

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