Dynamism focuses on the actions or forces causing movement. This is opposed to focusing on the movement or object being moved.
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Kinetics refers to the study of motion or the forces that cause movement.
A body moves when there is an external force acting upon it. The action-reaction forces cancel each other out, but external forces can cause a net force resulting in acceleration and movement.
Visual movement refers to the perception of movement in still images or videos, whereas real action involves physical movement in the real world. Visual movement can be created through techniques like animation or optical illusions, while real action requires bodily motion and interaction with the physical environment. The main difference is that visual movement is an illusion that tricks the brain into perceiving motion, whereas real action involves actual movement and energy expenditure.
In physics, the "line of action" refers to an imaginary line along which a force is considered to act. It helps simplify the analysis of forces acting on an object by pinpointing where the force is concentrated. Understanding the line of action is important for calculating torque and determining the effect of forces on an object's motion.
In biomechanics, internal force refers to the forces generated within the body by muscles, tendons, and ligaments during movement. These forces are responsible for producing motion and stabilizing the body during physical activities. Internal forces play a key role in generating movement and controlling joint motion.