What causes the weather? In most situations, at least two forces act on any object. The overall effect of these forces makes it act differently. For example, if a falling object. Air Resistance. Air Resistance What two forces are acting on an object when it falls? Gravity Air resistance. Pollution Earth and Beyond. What is pollution? The contamination of air, water, or soil by substances that are harmful to living organisms.
Similar presentations. Upload Log in. My presentations Profile Feedback Log out. A passenger jet could glide for up to about 60 miles if it suffers a total engine failure at its cruising altitude.
A typical commercial aircraft has a lift to drag ratio of around This means that for every 10 miles it travels forward it loses 1 mile in altitude.
This flight is so long that it has to be operated by a specially configured AULR with extra fuel capacity. As the airplane descends and decelerates, the pilot will begin to search for a safe area to perform an emergency landing. Ideally, the pilot will land on a nearby landing. Wide-body aircraft like the Boeing are rated to fly for more than five hours on a single engine. On Feb. The plane landed safely in Honolulu.
The NTSB concluded that a fan blade inside the engine fractured, leading to the failure. Yes, a four-engine aircraft is safer than a two-engine aircraft in general because of higher redundancy. Two-engine aircraft used to be prohibited from transoceanic flights for that reason. As of February , the had been involved in 31 aviation accidents and incidents, including 7 hull losses 5 during flight and 2 on the ground with fatalities, and 3 hijackings.
The program was launched in October with an order from United Airlines. In June , United flew its first in revenue service. The Boeing board of directors authorized production of the on June 26, , and the first was delivered to Cathay Pacific Airways in June I have noticed for a while the A has four engines and the Boeing only has two engines and they are about the same size.
It helps them by making their movement easy. Minimum resistance in water increases the speed of the movement, organisms move at a faster speed. Streamline is something that has a shape that provides little resistance to air or fluid flow. An example of streamline is a slick, smooth aircraft. To construct or reconstruct an object to reduce the amount of drag it undergoes as it moves through a fluid, especially air or water.
Presence of this kind of body shape is advantageous for their living. Hey mate here is your answer. Streamlining is a design that offers the least resistance to the flow of a fluid, especially air or water. Friction is minimum for a streamlined shape, which is rounded in the front and narrow at the back. This idea of keeping the airfoil fixed and having the air stream past the airfoil can be a bit confusing. Yet you experience the same kind of thing every day!
When you stand on the corner and watch a car go by, the air around you is relatively still. As the car moves through the air there are aerodynamic forces present. Now if you were in the car and put your hand out the window, you could feel the aerodynamic force pushing on your hand. Streamline is slimmer at the ends and thicker at the middle. It helps to decrease the drag created by fluids and thus allowing the body to move freely.
The shape of the boat is streamlined and this shape helps in reducing friction. The boat will speed easily through the waves. So, with both air and water, a streamlined shape reduces friction and helps the boat or car go quickly.
A flat front increases air or water friction and slows the boat or car down. A streamlined process means fewer errors and delays. You probably use dozens of business processes every day. For example, you may go through the same steps each time you generate a report, resolve a customer complaint, contact a new client, or manufacture a new product.
Answer: Streamlining is a design that offers the least resistance to the flow of a fluid, especially air or water. Friction is minimum for a streamlined shape, which is rounded in the front and narrow at the back. It is useful as: Ship also have streamlined shapes to reduce friction with water. Answer: The four examples of streamlined objects are a car,an airplane,a rocket,a bullet,a ship,a submarine,a dolphin.
Objects moving in fluids face the friction of the fluid that opposes their motion. So Objects moving in fluids must have unique shapes called streamlined shapes to reduce the fluid friction.
The special shape given to the bodies moving in the fluids like ships in water and aeroplanes in the air to reduce the fluid friction is called streamlined shape. Shapes that are designed to reduce drag are called streamlined shapes. Cars, airplanes, rockets and speedboats are all shaped in such a way that they are streamlined to reduce maximum drag, so friction is minimum on these objects.
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