Why cars and planes are designed to be streamlined?

Fast-moving vehicles are given a streamlined shape as their streamlined shape cuts through the air very easily and thus increased their speed. The streamlined shape is given to aeroplanes in the air and ships in the water to reduce fluid friction.

Do buses have streamlined shape?

Answer : Bus is not streamlined shape. It is a cuboid shape.

Why are aeroplanes streamlined Where do we find streamlined shapes in nature?

The aeroplanes are streamlined in order to reduce the drag(friction in air) which results in more speed and consumption of less fuel. We see streamlined shapes in fish and birds so they can cut through water and air respectively.

Why do cars have aerodynamic body shapes?

Automobiles started using aerodynamic body shapes in the early part of their history. As engines became more powerful and cars became faster, automobile engineers realized that wind resistance significantly hindered their speed.

What determines the aerodynamic efficiency of a car?

Drag coefficient The aerodynamic efficiency of a car’s shape is measured by its co-efficient of drag (generally known as its Cd figure). For example, a flat plate held at right angles to the airflow has a Cd of 1.25, whereas the most efficient production car shapes at the moment have a Cd of about 0.28.

What happens to the aerodynamic purity when a car is developed?

When a car is being developed for production, some of the aerodynamic purity of the original design is usually lost. Sometimes the changes are made for reasons of cost.

What is the aerodynamic drag of a flat plate?

For example, a flat plate held at right angles to the airflow has a Cd of 1.25, whereas the most efficient production car shapes at the moment have a Cd of about 0.28. However, this Cd figure cannot be used by itself to calculate a car’s aerodynamic drag because it does not take into account the car’s frontal area.