The common swift can reach 220km/hr in a dive: http://www.commonswift.org/FAQ_english.html
This makes it one of Europe's fastest birds, capable of outflying even a peregrine or a hobby. Only the hobby can maneouvre fast enough to catch a swift.
By comparison the cruising speed of an (unladen!) (European) swallow is around 38km/hr. http://www.style.org/unladenswallow/
African or European?
In fluid dynamics an object is moving at its terminal velocity if its speed is constant due to the restraining force exerted by the air, water or other fluid through which it is moving.
A free-falling object achieves its terminal velocity when the downward force of gravity (Fg) equals the upward force of drag (Fd). This causes the net force on the object to be zero, resulting in an acceleration of zero.[1]
As the object accelerates (usually downwards due to gravity), the drag force acting on the object increases, causing the acceleration to decrease. At a particular speed, the drag force produced will equal the object's weight (mg). At this point the object ceases to accelerate altogether and continues falling at a constant speed called terminal velocity (also called settling velocity). Terminal velocity varies directly with the ratio of weight to drag. More drag means a lower terminal velocity, while increased weight means a higher terminal velocity. An object moving downward with greater than terminal velocity (for example because it was affected by a downward force or it fell from a thinner part of the atmosphere or it changed shape) will slow until it reaches terminal velocity.
The swallows and martins have an evolutionary conservative body shape which is similar across the family but is unlike that of other passerines.[2] Swallows have adapted to hunting insects on the wing by developing a slender streamlined body and long pointed wings, which allow great maneuverability and endurance, as well as frequent periods of gliding. Their body shape allows for very efficient flight, which costs 50-75% less for swallows than equivalent passerines of the same size. Swallows usually forage at around 30-40 km/h, although they are capable of reaching speeds of between 50-65 km/h when traveling. The bill of the Sand Martin is typical for the family, being short and wide.
Like the unrelated swifts and nightjars, which hunt in a similar way, they have short bills, but strong jaws and a wide gape. Their body length ranges from about 10-24 cm (3.9-9.4 in) and their weight from about 10-60 g (0.35-2.1 oz). The wings are long, pointed, and have nine primary feathers. The tail has 12 feathers and may be deeply forked, somewhat indented, or square-ended. A long tail increases maneuverability, and may also function as a sexual adornment, since the tail is frequently longer in males. Female Barn Swallows will select mates on the basis of tail length.
If its velocity is constant, then the net force on it is zero, regardless of its mass or speed.
It depends on the average wind-speed velocity of an African Swallow.
The main difference between speed and velocity involves direction. Velocity involves an object moving in a particular direction.
Velocity provides information about both the speed and direction of an object, while speed only describes how fast an object is moving without indicating direction. This distinction is important in physics and engineering, as it allows for a more complete understanding of an object's motion.
No. Velocity includes a direction vector, which speed does not have.
What do you mean, an African or a European Swallow
The average swallow flies at at a cruising speed of 15 beats per second and an amplitude of 22 cm.
If its velocity is constant, then the net force on it is zero, regardless of its mass or speed.
The air speed velocity of an unladen European Swallow is about 20.1 miles per hour or 32.4 kilometers per hour.
AnswerAre you suggesting that birds migrate? African or European swallow?
monty python and the holy grail
Part of every velocity is a speed. Speed is the size of the velocity.But the velocity also has a direction, which the speed doesn't.'30 mph North' and '30 mph West' are the same speed but different velocity.
It depends on the average wind-speed velocity of an African Swallow.
In order to maintain air speed velocity, a swallow needs to beat its wings 43 times every second.
An object that has both speed and direction is considered to have velocity. Velocity is a vector quantity that includes both the magnitude (speed) and direction of motion of an object. For example, a car moving north at 60 km/h has a velocity of 60 km/h north.
Velocity is a vector, which means it has a direction, but speed isn't. Speed is the absolute value of velocity. Velocity can be negative, meaning that the speed is opposite to the direction that you're calling the positive direction.
Simly stated, velocity is speed in a defined direction. If you travel 5mph north, the speed is the same as if you travel 5mph east, but the velocity is different.