Question

Define the motion of fixed axis rotation and
give an example.
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Answer 1

Answer:

Explanation:

A rigid body can have two different type of motion.  They are translation or rotation about fixed axis.

If a rigid body is rotating about a fixed axis, the particles will follow a circular path.  The further a particle is from the axis of rotation, the greater the angular velocity and acceleration  will be.  On the other hand, any particle that are located on the axis of rotation will be stationary.

When in motion, a rigid body is believed to be a system of particles. Each of its particles follows a path depending on the kind of motion it follows. In a translational motion, all the particles move and behave in a similar manner.  But in rotational motion, the rigid body dynamics indicate a different behaviour.

All the particles behave differently. Since rotation here is about a fixed axis, every particle constituting the rigid body behaves to be rotating around a fixed axis. As the distance from the axis increases the velocity of the particle increases.