Wheel

A wheel is a circular component that is intended to rotate on an axle bearing. The wheel is one of the main components of the wheel and axle which is one of the six simple machines. Wheels, in conjunction with axles, allow heavy objects to be moved easily facilitating movement or transportation while supporting a load, or performing labor in machines. Wheels are also used for other purposes, such as a ship's wheel, steering wheel, potter's wheel and flywheel.

Common examples are found in transport applications. A wheel greatly reduces friction by facilitating motion by rolling together with the use of axles. In order for wheels to rotate, a moment needs to be applied to the wheel about its axis, either by way of gravity, or by the application of another external force or torque.

Etymology

The English word wheel comes from the Old English word hweol, hweogol, from Proto-Germanic *hwehwlan, *hwegwlan, from Proto-Indo-European *k^wek^wlo-, an extended form of the root *k^wel- "to revolve, move around". Cognates within Indo-European include Icelandic hjól "wheel, tyre", Greek κύκλος kúklos, and Sanskrit chakra, the latter both meaning "circle" or "wheel".

Nursery rhyme

A nursery rhyme is a traditional poem or song for young children in Britain and many other countries, but usage only dates from the late 18th /early 19th century. In North America the term Mother Goose Rhymes, introduced in the mid-18th century, is still often used.

History

Lullabies

The oldest children's songs of which we have records are lullabies, intended to help a child sleep. Lullabies can be found in every human culture. The English term lullaby is thought to come from "lu, lu" or "la la" sound made by mothers or nurses to calm children, and "by by" or "bye bye", either another lulling sound, or a term for good night. Until the modern era lullabies were usually only recorded incidentally in written sources. The Roman nurses' lullaby, "Lalla, Lalla, Lalla, aut dormi, aut lacta", is recorded in a scholium on Persius and may be the oldest to survive.

Many medieval English verses associated with the birth of Jesus take the form of a lullaby, including "Lullay, my liking, my dere son, my sweting" and may be versions of contemporary lullabies. However, most of those used today date from the 17th century. For example, a well known lullaby such as "Rock-a-bye, baby on a tree top", cannot be found in records until the late-18th century when it was printed by John Newbery (c. 1765).

Wheels on the Bus

The Wheels on the Bus may refer to:

List of animal sounds

This is a list of words used in the English language to represent the noises of particular animals, especially noises used by animals for communication. Words on the list are in the form of verbs, though many can also be used as nouns or interjections, including many onomatopoeias (additional ones here abbreviated "OP").

See also

References

External links

Power Wheels

Power Wheels is a brand of battery-powered ride-on toy cars for kids ages 12 months to seven years old. Power Wheels ride-ons are built with kid-sized, realistic features – in some cases, real working features like FM radios, opening/closing doors and hoods, power lock brakes, and both forward and reverse motion.

History

The Power Wheels brand name dates back to 1984, when San Francisco-based toy company Kransco acquired Pines of America, makers of battery-powered vehicles for children. Two years later, Kransco renamed the line "Power Wheels". By 1990 sales of the battery-powered vehicles reached over 1,000,000 per year.

In 1994, Power Wheels was purchased by Mattel. Following Mattel's acquisition of Kransco, the Power Wheels line immediately became part of Fisher-Price toys out of East Aurora, New York. With the addition of new vehicle licenses the new Power Wheels by Fisher-Price and Mattel lines did well.

In 1999, Fisher-Price announced the Harley-Davidson Motorcycle Ride-On – which contributed to a year of record sales for the entire product line.