Question

What is a rigid body ? What is meant by
the rotation axis of a rigid body?​

Answer 1

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A rigid body, used as a model of a real is a collection of particles such that eve particle is at rest relative to all other particles. It is assumed that the relative positions of the particles in a rigid body do not change under external forces, i.e., a rigid body cannot be deformed.

There is really no such object as all objects can be deformed by applying suitable forces and so the concept of a rigid body is an ideal one. But many solid objects, such as stones, thick metal rods, etc., are good approximations of a rigid body when forces on them are not very large.

When a rigid body undergoes rotational motion, its particles move in circles. The centres of all these circles lie on a straight line. This straight line is called the rotation axis of the rigid body.

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Answer 2

Answer:

hey mate

Explanation:

RIGID BODY MEANS THE BODY WHOES PATICLES ARE RELATIVELY AT REST AND CAN NOT BE MOVED...

BUT NO BODY IS PERFECTLY RIGID IN THIS WORLD..

BUT DIAMOND IS ASSUMPED AS A RIGID BODY AS BECAUSE IT HAD VERY SIMILAR PROPERTIES AS COMPARED TO THE RIGID BODY ..

BUT STILL NO BODY IN THIS UNIVERSE IS PERFECTLY RIGID IN NATURE...

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ROTATIONAL AXIS OF A RIGID BODY:-

IT IS THE AXIS OVER WHICH EVERY PARTICLE OF A BODY ROTATES IN A COMPLETE CIRCULAR MOTION...

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HOPE IT HELPED ✌️❤️

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