Dodgey:org:n- no not person-bouncer org:NThe law of conservation of energy is a fundamental principle within classical physics. It describes how energy can neither be created nor destroyed, only converted from one form to another. This means that the total amount of energy in the universe remains constant. For more information on this law, please check out this helpful article here!Laws of classical physics are very important when it comes to understanding how things work around us. They help us understand why certain things occur in nature and how they work physically. Before learning about rigid body motion, it is important to understand the definition of the "moment of inertia". The moment of inertia refers to how difficult it is to rotate an object. It depends on how objects are distributed with respect to the rotation axis. The total mass that is rotating must be considered when calculating the moment of inertia, as it contributes to how much force must be applied to initiate a rotation. In addition, each mass should be considered along with its distance from the axis of rotation. We can calculate the moment of inertia using the formula below.formula_1 Now, let's look at how this affects rigid body motions. This will allow us to further our understanding of how it is applied in mechanics.As we know, within classical physics, all objects are considered to be made up of molecules that are moving at different speeds and directions. However, when dealing with rigid bodies (i.e., non-fluid objects), these molecules remain in constant contact with one another. Therefore, even though the molecules are constantly bumping into each other while the molecule rotates around an axis, they stay very close to their original positions relative to one another throughout this process. There are four types of rigid body motions. These are rotational equilibrium, rotational kinematics, angular kinematics, and angular dynamics. First, let's talk about the two laws in the picture above in the "Rotational Equilibrium" section. The first law states that when an object is rotating in space, the sum of its external torques (i.e., torques exerted on it by external forces) must be equal to zero...this means that if there is an external torque acting upon it then there must be an external force opposing that torque that is equal in magnitude and opposite in direction to keep it at equilibrium. Many times, physicists will perform experiments to show that the sum of external torques is equal to zero. These experiments are called the "Kagi's theorem". The second law states that there is no differential rotation of a rigid body...this means that if you rotate an object through a certain angle, its new angular velocity must be equal to the initial angular velocity, at that instant. Now let's talk about the third law. When you are pointing something at an object, it has no affect on its motion. However, if there is some force exerted upon it then it will rotate in response to this force. This can be observed with pendulums.
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