Rigid

In physics, the term "rigid" refers to an object or body that maintains its shape and size under the influence of external forces. A rigid body does not deform or change its dimensions when subjected to forces, rotations, or translations.

Characteristics of Rigid Bodies:

1. Fixed Shape: A rigid body maintains a constant shape, meaning its internal dimensions do not change.
2. No Deformation: Rigid bodies do not undergo any deformation when subjected to external forces.
3. No Internal Stress: The internal stress within a rigid body is negligible, as it does not experience any deformation.
4. No Shearing: Rigid bodies do not experience shearing forces that would cause different parts of the body to move relative to each other.

Study Guide:

To understand the concept of rigid bodies in physics, it is important to focus on the following key areas:

1. Definitions and Characteristics:

Learn the definition of a rigid body and its key characteristics. Understand how a rigid body differs from a non-rigid or deformable body.

2. Equilibrium of Rigid Bodies:

Study the concept of equilibrium of rigid bodies under the action of forces. This involves analyzing the conditions for a rigid body to be in static equilibrium and not undergo any translational or rotational motion.

3. Rigid Body Dynamics:

Explore the dynamics of rigid bodies, including their rotational motion and the application of principles such as torque, angular momentum, and moment of inertia.

4. Applications and Examples:

Understand how the concept of rigid bodies applies to real-world scenarios. Study examples of rigid bodies in engineering, architecture, and everyday objects.

5. Problem Solving:

Practice solving problems related to rigid bodies, including equilibrium conditions, rotational motion, and the application of relevant physical principles.