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well im not sure but i think cos the air that is taken in is used to push your blood so if u have no air u will die after 1 hour
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What is an example of reducing friction is important in the moving parts of machinery?
friction is a force which opposes the direction of the movement of a certain body. reducing the friction between moving parts will lead to an increase of acceleration or speed of that particularly body.
What is the friction between the air and the surface of a moving object?
Viscous drag on the movement of the falling body due to air medium
Example of ways increasing friction?
Friction can be increased by reducing the speed of the moving object. Friction can also be increased by increasing the weight of the moving object.
To create friction in your hands what do you have to do?
You can increase the friction by increasing the roughness of the surface you are working on. Reduce the speed of the moving object, or increase the weight of the body you are working on. Increase the surface area of contact.
Why speed decreases in denser medium and increases in rare medium?
The speed depends on many factors, and one of the factor is friction. In denser medium (WATER) friction is more so speed is less, while in free space and vacuum friction is less speed is more, speed and friction is inversely proportional to each other.so, speed decreases in denser medium than in rare medium. speed α 1/friction So, automobiles like cars are applied a lubricant on its outer surface which decreases the friction and move with more speed. Now automobile companies working to reduce friction which helps to enhance speed. If we go in depth in this topic friction is the major criteria that effect the speed. we can run faster in free space(rarer medium) than in water(denser medium) i.e.,water is in liquid state the water molecules are closely packed so it has more defensive power i.e., more friction, While in free space the air molecules are lightly packed so it has less friction. In this way we can prove that body moves faster in rarer medium than in denser medium. Eg: throwing a ball in water travels less distances than compared a ball throwing in free space
How does drag work?
Drag force, or the force of air friction for a falling body, increases with speed. A falling object will reach a speed at which the force of air friction will be equal to and opposite the force of gravity. At that point, the object will no longer accelerate. It's speed will remain constant, and we call that speed (and direction) its terminal velocity.
What would be the appearance of the speed-time curve if the falling body were so light that the effect of air friction could not be neglected?
If air friction can be neglected, then the speed/time graph for any falling body would bea straight line that slopes up. If the body were falling near the Earth's surface, then theslope of the line would be (9.8 meters per second) per second.I'm pretty sure that the lighter objects are the ones most affected by air friction,and the heavier ones approximate the math of pure gravity more closely.Think about dropping a rock and a piece of tissue.
Does the body falling to the earth travel at the same speed from the very beginning of its travel?
No. Its speed keeps increasing as it falls.
What are factors that affect an object's kinetic energy?
The factors affecting kinetic energy are mass and velocity.
Can an object in infinite free fall using earth's gravity in a vacuum reach the speed of light?
No. There's an interesting mathematical relationship here: Assuming no friction and no interference from other bodies, the speed acquired by a body falling "from infinity" towards another object is exactly equal to the "escape velocity" from that object. For Earth, this is about seven miles per second, nowhere near the speed of light.
What affects the speed of a falling object?
The mass of a falling object will affect the speed at which it falls. Additionally, the shape or geometryof that object will also have an effect. The shape of a falling object will have a dramatic effect on the amount of dragthat the object will experience. Consider that a flat piece of cardboard will fall more slowly than a glass ball of the same mass, and it will be more easy to visualize how drag is a function of shape.=======================================Beulah the Buzzer gagged on the first sentence of the response above, andSignor Galileo rotated 2pi in his crypt.The mass of a falling object will NOT affect the speed at which it falls.The remainder of the response above is correct and well stated, provided onlythat the objects are falling through air. If not, then neither their shape nor theirgeometry affects their rate of fall either.
What is an example of reducing friction is important in the moving parts of machinery?
friction is a force which opposes the direction of the movement of a certain body. reducing the friction between moving parts will lead to an increase of acceleration or speed of that particularly body.
What is the friction between the air and the surface of a moving object?
Viscous drag on the movement of the falling body due to air medium
What happens when a falling object stops?
It suddenly stops and hits wherever it's landing. ---------------------------------------------- When a falling object stops accelerating then the body would continue moving with the speed attained. This speed is known as terminal speed. This is what happens when a rain drop falls from a large height through the atomosphere.
Example of ways increasing friction?
Friction can be increased by reducing the speed of the moving object. Friction can also be increased by increasing the weight of the moving object.
How does the age of a horse affect its speed?
The age of a horse affects the speed of the horse because like a human with age the body has experienced wear, and does not repair itself as well.
To create friction in your hands what do you have to do?
You can increase the friction by increasing the roughness of the surface you are working on. Reduce the speed of the moving object, or increase the weight of the body you are working on. Increase the surface area of contact.
