Rigid body and non rigid body meaning with examples
Rigid Body
A rigid body is an idealized object in physics and engineering that does not undergo deformation when subjected to external forces or moments. It maintains its shape and dimensions, and the distances between all pairs of points within the body remain constant. In other words, it does not experience internal deformation or relative motion between its particles.
Examples of rigid bodies include
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Solid Metal Bar: A solid metal bar, like a steel rod, is often considered a rigid body because it maintains its shape and size when forces are applied.
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Wooden Block: A wooden block is typically rigid, as it does not deform significantly under ordinary loads.
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Concrete Structure: Large concrete structures, such as buildings and bridges, are designed as rigid bodies. They maintain their shape under various loads.
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Metal Bicycle Frame: The frame of a bicycle is designed to be rigid to provide stability and support for other components.
Non-Rigid Body
A non-rigid body is an object that can undergo deformation or change in shape when subjected to external forces or moments. It may experience internal relative motion between its particles or components.
Examples of non-rigid bodies include
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Rubber Ball: A rubber ball is a classic example of a non-rigid body. It deforms when squeezed or impacted and returns to its original shape when the force is removed.
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Inflatable Balloon: An inflatable balloon is highly non-rigid. It can change shape dramatically when inflated or deflated.
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Human Body: The human body contains both rigid (bones) and non-rigid (muscles, skin) components. Soft tissues can deform under pressure or when muscles contract.
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Plasticine (Modeling Clay): Plasticine or modeling clay is a non-rigid material. It is malleable and can be easily shaped and deformed by applying external forces.
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Water: Liquids, including water, are non-rigid substances. They do not have a fixed shape and can flow and change their configuration in response to external forces.
In engineering and physics, rigid bodies are often used as simplifications to analyze systems, while non-rigid bodies are considered when studying deformations and material behaviors.