Air resistance is a force that is caused due to air when an object moves through it. This force acts in the opposite direction to a body passing through the air. Air resistance exerts a frictional force against the moving body. As a body moves, air resistance decelerates it down.
Ignoring the effects of air resistance, or drag, allows one to derive simple equations to predict the time of flight, range, and various other parameters of the motion. These equations are, however, only approximations to the true motions of real objects.
Resistance depends on the resistivity of the material. The resistivity of the air is 1.3 × 10^16 to 3.3 × 10^16Ω-m at 200 C. With no ions in the gas its resistance is infinity, so same hold true for air also. So, the resistance of any gaseous material depends on the ion content of that gas.
Air resistance (or drag), is a resistive force that acts against objects that are moving through the air. Drag acts on objects moving through any fluid (gas or liquid) – and is larger in liquids.
Air Resistance Formula
d v m g − k v = d t m .
The less massive the object is, the more the force of air resistance slows the object down as it falls. If two objects were dropped on the moon, where there is no air, they would fall at the same rate no matter how much they differ in mass. The shape of the object can impact how much it is affected by air resistance.
Air resistance is the force acting on an object that is moving through air flowing in the opposite direction. The air “resists” the object's movement, slowing it down by friction that is created as the object collides with air molecules.
Isaac Newton's sine-squared law of air resistance is a formula that implies the force on a flat plate immersed in a moving fluid is proportional to the square of the sine of the angle of attack.
The mass, size, and shape of the object are not a factor in describing the motion of the object. So all objects, regardless of size or shape or mass (or weight) will free fall at the same rate; a beach ball will fall at the same rate as an airliner.
The electric resistivity of air is found to vary between 1.5 · 1013 and 6 · 1013 Ω m and to correlate with changes in electric field.
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