Air Resistance
Air Resistance - Related Videos
14:04
Biosensor for Detection of Antibiotic Resistant Staphylococcus Bacteria
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Cited by 17 •
2013
Lytic phage biosensors and antibody beads are able to discriminate between methicillin resistant (MRSA) and sensitive staphylococcus bacteria. The phages were immobilized by a Langmuir-Blodgett method onto a surface of a quartz crystal microbalance sensor and worked as broad range staphylococcus probes. Antibody beads recognize MRSA.
01:27
Air-entraining Agents
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2024
Air-entraining agents improve the durability and workability of concrete in climates with frequent freezing and thawing. These agents prevent cracks by introducing small air bubbles into the mix, creating spaces accommodating water expansion when temperatures drop. The air-entraining agents lower the surface tension of water, forming stable, small air bubbles. This method is more effective than having accidental large voids, as the intentional, smaller, and evenly distributed air voids improve...
01:22
Resistivity
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2023
When a voltage is applied to a conductor, an electrical field is generated, and charges in the conductor feel the force due to the electrical field. The current density that results depends on the electrical field and the properties of the material. In some materials, including metals at a given temperature, the current density is approximately proportional to the electrical field. In these cases, the current density can be modeled as: where σ is the electrical conductivity and is represented...
01:19
Resistance
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2023
When a current moves through any conductor, the conductor causes some level of difficulty for the current to flow. The measure of that difficulty is known as the resistance of the material and is represented by R. Every material has its own resistance. In the case of conductors, heat is emitted whenever a current passes through them. Resistance depends on the resistivity of the material. Resistivity is a characteristic of the material used to fabricate electrical components, whereas the...
09:04
Fabrication of VB2/Air Cells for Electrochemical Testing
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Cited by 5 •
2013
A protocol is presented to study multi-electron metal/air battery systems by using previous technology developed for the zinc/air cell. Electrochemical testing is then performed on fabricated batteries to evaluate performance.
FAQs
Air resistance reduces the net force in the direction of motion because it acts oppositely. As a result, an object may accelerate less than it would in an idealized model that ignores air. The effect becomes increasingly important as speed rises, so predictions based only on other forces can diverge from observed motion.
The main influencing variables identified for air resistance are an object’s speed, shape, surface area, and the density of the surrounding air. Changing any of these can alter the opposing force and therefore the motion. Considering them together helps explain why objects with different designs or moving conditions behave differently.
A falling object can reach terminal velocity when the opposing effect of air resistance balances the force driving its fall. At that point, the object no longer continues accelerating and instead moves at a steady speed. This concept provides a useful way to connect changing forces with the eventual behavior of falling objects.
Projectile-motion analysis becomes more realistic when it accounts for the opposing effect of air rather than treating the motion as idealized. Because air resistance commonly grows substantially at higher speeds, it can change how the projectile moves through the air. Including this factor helps explain differences between simplified predictions and real-world trajectories.
For falling objects, air resistance helps determine whether acceleration continues or whether motion approaches a steady speed. In parachute applications, controlling this opposing effect is central to controlling descent. Studying the relationship between resistance and speed therefore connects the physics of falling motion with the practical goal of managing how an object descends.
Engineers account for air resistance because it affects efficiency, stability, and motion through air. Vehicle and aircraft designs must consider how shape and surface area influence the opposing force, while sports equipment can be designed with its effects in mind. Applying these principles helps connect physical analysis with performance and design decisions.