Movement occurs in a straight line: “Sliding” or “gliding”Example: forearm sliding on the table
When we talk about movement occurring in a straight line, we often refer to it as sliding or gliding
When we talk about movement occurring in a straight line, we often refer to it as sliding or gliding. These terms are used to describe the smooth and continuous motion of an object along a surface without any rotational or angular movement. A common example of this type of movement is when we slide our forearm on a table.
When we place our forearm on a table and then apply a force to push it forward or backward, the forearm moves in a straight line without any rotation or bending. This is because the force we apply is parallel to the surface of the table and acts in the direction of motion. As a result, the forearm slides or glides smoothly on the table without any deviation from a straight path.
The motion of sliding or gliding is dependent on various factors such as the nature of the surfaces in contact, the applied force, and the presence of any friction between the surfaces. For example, if the table surface is rough or sticky, it may resist the sliding motion, making the forearm move with more difficulty. On the other hand, if the table is smooth and lubricated, it can enhance the sliding or gliding motion, allowing the forearm to move more effortlessly.
This type of movement is different from other types of motion, such as rolling or spinning, where an object rotates or pivots about a specific point or axis. Sliding or gliding movement occurs when the applied force is parallel to the surface, whereas rotational or angular motion occurs when the force has a perpendicular component to the surface.
In summary, when an object moves in a straight line along a surface without any rotational or angular motion, we refer to it as sliding or gliding. The sliding of a forearm on a table is a perfect example of this type of movement, where the applied force is parallel to the surface, resulting in a smooth and continuous motion.
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