Science
Gravity

# How does air resistance affect the speed of falling objects?

123 ###### 2009-01-08 23:38:55

Air resistance will determine the "terminal volocity" based on surface area

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## Related Questions  The speed when falling objects no longer accelerates due to air resistance is the maximum falling velocity. u use the falling object model (doesnt include air resistance) Nearly all falling object are affected by the resistance of air. However some objects have a mass greater than the air can affect. There is also the case where air resistance equals that of gravity and the object will not fall any faster. Objects falling through air experience "air resistance". Also referred to as "drag", the resistance is dependent on the speed of the object and the surface area exposed to the airflow. Different shapes have different wind resistances, which will slow speed differently. As a falling object accelerates through air, its speed increases and air resistance increases. While gravity pulls the object down, we find that air resistance is trying to limit the object's speed. Air resistance reduces the acceleration of a falling object. It would accelerate faster if it was falling in a vacuum. The speed of falling objects increases at a constant rate. Two objects falling at the same time will fall with the same speed (assuming they both have similar shape and density) Falling objects increase their speed as they fall, because their weight (the force of gravity) pulls them to Earth. ... Objects fall faster until they reach their terminal speed, which is reached when the upward (air resistance) and downward (weight)forcesare equal. Gravity itself is a force, so it does not increase its speed. However, gravity will gradually increase the speed of objects which are freely falling (i.e. gravity accelerates objects). The only exception is when the object is encountering some kind of resistance or opposite force. A prime example would be air resistance. But in such cases an object is not truly free falling anyway.  As objects fall, they are accelerated by the force of gravity, which causes them to continually fall faster, until they either reach the ground, or until they reach what is known as terminal velocity, which is the speed at which air resistance is equal to the force of gravity, so that the falling object does not accelerate any more. And what makes you think an object would fall, or should fall, precisely at such a speed? How do you get that number? - Anyway, that's not the way our Universe works. Without air resistance, an object that falls downward falls faster and faster - its speed increasing by 9.8 meter/second every second. With air resistance, a falling object will eventually reach a speed at which friction (air resistance) balances the downward force of gravity. This speed is different for different objects.  The acceleration is the same for all objects, as long as air resistance is insignificant. After a while, different objects will have different amount of air resistance. Also, even without air resistance, the speed depends not only on the acceleration, but also on how how long the objects are falling. Some factors that would influence the speed of a falling object: * size of object (air resistance) * air density * object's aerodynamics Objects fall in a vacuum at 9.8 m/s2 Air resistance is proportional to the cube of speed. the amount of air resistance on an object depends on the size, shape, and speed of the object. Air resistance is the force that opposes the motion of objects through air. Yes. It's called wind resistance and is the reason why paper falls slower than a rock. If two objects are put in a perfect vacuum, where all of the air is removed, a feather will fall as fast as a one ton weight. Gravity effects all objects in the same way, and wind resistance is the only reason they fall at different rates. The only reason falling objects don't fall at the same speed on Earth is the countering force of wind resistance. Without air, all objects would fall at the same rate, regardless of mass (ex. Galileo's ball experiments, as well as the hammer and feather experiment on the Moon).  Ignoring the effects of air resistance, freely falling objects accelerate at a constant rate. On Earth, the acceleration due to gravity is 9.8 meters per second squared or 32.2 feet per second squared. In the real world, however, objects don't speed up forever. Air resistance places a limit on how fast they can go. Due to air resistance as the resistance is directly proportional to the speed but at certain speed called transitional speed or critical speed the resistance become directly proportional to square the speed so the resistance increase decreasing the falling speed. The forces that affect the rate of a falling object are Gravity and Air Resistance. Gravity affects the speed and the velocity of the object by speeding it up as it falls closer to the earth, and Air resistance works against the object pushing against it.

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