- #1
sarm2005
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For a spinning object does the drag act against the direction the object is rotating?
Drag on a rotating object, also known as rotational drag, is the resistance force that opposes the motion of a rotating object through a fluid, such as air or water. It is caused by the friction between the object's surface and the fluid it is moving through.
The faster an object rotates, the greater the drag force it experiences. This is because the fluid molecules have less time to move out of the way, resulting in more collisions and thus, higher drag.
The main factors that affect drag on a rotating object are the object's shape, size, and speed. A streamlined shape, smaller size, and lower speed can all help to reduce drag on a rotating object.
The drag force on a rotating object can be calculated using the formula Fd = 1/2 * ρ * v^2 * Cd * A, where ρ is the density of the fluid, v is the speed of the object, Cd is the drag coefficient, and A is the projected frontal area of the object.
To reduce drag on a rotating object, one can use a streamlined shape, minimize the object's size, and decrease its rotational speed. Additionally, modifying the surface texture of the object to reduce friction with the fluid can also help to reduce drag.