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A Grand Prix motorcyclist leaning in a turn The forces, both physical and inertial, acting on a leaning bike in the rotating reference frame of a turn where N is the normal force, F f is friction, m is mass, r is turn radius, v is forward speed, and g is the acceleration of gravity.
The concept was known in the 1870s as a water velocipede [1] and the name was in use by the late 1890s. [2] Power is collected from the rider via a crank with pedals, as on a bicycle, and delivered to the water or the air via a propeller. [3] Seating may be upright or recumbent, and multiple riders may be accommodated in tandem or side-by-side. [4]
A bicycle, also called a pedal cycle, bike, push-bike or cycle, is a human-powered or motor-assisted, pedal-driven, single-track vehicle, with two wheels attached to a frame, one behind the other. A bicycle rider is called a cyclist, or bicyclist. Bicycles were introduced in the 19th century in Europe. By the early 21st century there were more ...
Motorized bicycles in Japanese law are treated as a 'miniature version of a motorcycle' in many cases, but a motorized bicycle should hook turn to the right in some cases on a signalized intersection with more than three lanes including a L/R turn lane in the same direction. A vehicle that has a maximum speed of over 20 km/h (12.4 mph) also ...
From a mechanical viewpoint, up to 99% of the mechanical energy delivered by the rider into the pedals is transmitted to the wheels (clean, lubricated new chain at 400 W), although the use of gearing mechanisms reduces this by 1–7% (clean, well-lubricated derailleurs and a straight chainline), 4–12% (chain with 3-speed hubs), or 10–20% (shaft drive with 3-speed hubs).
A physical change involves a change in physical properties. Examples of physical properties include melting, transition to a gas, change of strength, change of durability, changes to crystal form, textural change, shape, size, color, volume and density. An example of a physical change is the process of tempering steel to
Transport phenomena encompass all agents of physical change in the universe. Moreover, they are considered to be fundamental building blocks which developed the universe, and which are responsible for the success of all life on Earth. However, the scope here is limited to the relationship of transport phenomena to artificial engineered systems. [2]
It is also estimated that the oceans supply about 90% of the evaporated water that goes into the water cycle. [20] The Earth's ice caps, glaciers, and permanent snowpack stores another 24,064,000 km 3 accounting for only 1.7% of the planet's total water volume. However, this quantity of water is 68.7% of all freshwater on the planet. [21]