Unrelating

Being one of the most basic human powered vehicles, the bicycle has two wheels attached to a vehicle that
is driven by a pedal. Bicycles were first presented in the 19th century and it is claimed that presently there are approximately about
one billion bicycles worldwide, outnumbering machines 2 to 1. In many regions of the world, bicycles are the main method of carry. Although
the essential use of the bicycle is as a means of carry, it has developed other uses including recreational actions, fitness actions
law enforcement applications and competitive sports.

History of Bicycles

Ever since the chain driven model was presented to the market, the basic
design of the bicycle had remained unchanged up to day. However, the usage of modern material and design methods
such as computer-aided design has improved the many views of the bicycle. Some bicycles are particularly
invented to adhee to standards of racing, cyclicling on mountains and even for law enforcement. Additionally, the concept of the bicycle has up to a great extent extended its contribution for the development of automobiles by introducing concepts such as ball bearings, pneumatic tires and spoke tensioned wheels.

What to Look for In a Bicycle

Dynamics
of the bicycle is something that should be referred to first. A bicycle has to maintain its center of gravity over the wheels in order to stay upright or balanced.
Therefore, it achieves this by the moving forward using the steering which is usually provided by the rider
and sometimes even by the bicycle itself. In addition in order to successfully navigate a turn, the combined or total center of mass
of both the bicycle and the rider must lean into the turn. A technique mentioned to as counter-steering is used to attain this task by directly turning the handlebars with the hands
or indirectly leaning or slanting the bicycle.

Through both biological and mechanical view points, the bicycle is an extremely
economical machine. When
comparing the energy an individual must spend to travel a given distance, the bicycle is stated to be the most efficiently
working self powered method of transportation. Nearly, 99% of the energy is transmitted to the wheels of the bicycle when a
rider exerts energy into the pedals. However when gears mechanisms are used this figure may drop by 10-15%.A rider using a bicycle
feels air drag or the resistive force that is exerted by air. When the speed is high, a lot of energy will be needed
to overcome this airdrag resulting in an exhaustive ride for the rider. However, the exerted drag can be significantly
diminished by placing the rider in a supine or a prone position and by covering the bicycle with fairing that is aerodynamic.

The main parts of the bicycle include the frame, steering mechanisms, seating, drivetrain, suspension, wheels and brakes. Certain bicycles may include optional
mechanics such as gearing which uses peculiar sizes of gears to obtain a mechanical advantage from the bicycle. Using gears a rider can produce a higher power output with a relatively low
power input and thus, maximizing the efficiency of the bicycle.