Free fall

In Newtonian physics, free fall is any motion of a body where gravity is the only force acting upon it. In the context of general relativity, where gravitation is reduced to a space-time curvature, a body in free fall has no force acting on it and moves along a geodesic. The present article only concerns itself with free fall in the Newtonian domain.

An object in the technical sense of free fall may not necessarily be falling down in the usual sense of the term. An object moving upwards would not normally be considered to be falling, but if it is subject to the force of gravity only, it is said to be in free fall. The moon is thus in free fall.

In a uniform gravitational field, in the absence of any other forces, gravitation acts on each part of the body equally and this is weightlessness, a condition that also occurs when the gravitational field is zero (such as when far away from any gravitating body). A body in free fall experiences "0 g".

The term "free fall" is often used more loosely than in the strict sense defined above. Thus, falling through an atmosphere without a deployed parachute, or lifting device, is also often referred to as free fall. The aerodynamic drag forces in such situations prevent them from producing full weightlessness, and thus a skydiver's "free fall" after reaching terminal velocity produces the sensation of the body's weight being supported on a cushion of air.

Park Tower

Park Tower may refer to:

See also

Tower

A tower is a tall structure, taller than it is wide, often by a significant margin. Towers are distinguished from masts by their lack of guy-wires and are therefore, along with tall buildings, self-supporting structures.

Towers are specifically distinguished from "buildings" in that they are not built to be habitable but to serve other functions. The principal function is the use of their height to enable various functions to be achieved including: visibility of other features attached to the tower such clock towers; as part of a larger structure or device to increase the visibility of the surroundings as in a fortified building such as a castle; or as a structural feature as an integral part of a bridge.

Towers can be stand alone structures or be supported by adjacent buildings or can be a feature on top of a large structure or building.

History

Towers have been used by mankind since prehistoric times. The oldest known may be the circular stone tower in walls of Neolithic Jericho (8000 BC). Some of the earliest towers were ziggurats, which existed in Sumerian architecture since the 4th millennium BC. The most famous ziggurats include the Sumerian Ziggurat of Ur, built the 3rd millennium BC, and the Etemenanki, one of the most famous examples of Babylonian architecture. The latter was built in Babylon during the 2nd millennium BC and was considered the tallest tower of the ancient world.

Siam Park City

Siam Park City (Thai: สวนสยาม; rtgs: Suan Sayam) is an amusement and water park in the Khan Na Yao district of Bangkok, Thailand. It opened in November 1980.

Working hours: Water Park 10:00 – 17:00 every day, Amusement Park 11:00 – 18:00 every day.

Park history

Siam Park City is an amusement park and water park located on Seri Thai Road and Khan Na Yao District on 300 acre. It was established in 1980. It has the biggest artificial sea in the world. Moreover, it has a spa, many sizes of swimming pool and a 7-storey waterslide. This place is call to the “Sea of Bangkok” and its slogan is “Siam Park… World of happiness enjoy unforgettable”

Siam park was opened 38 years ago in November 1975 by the founder Chaiwat Luangamornlert. His aim was and still is, to bring fun to Thailand and put a smile on children's faces. The park now has 2 million visitors a year from all over the world and has some of the largest rides in the region.

The park is set in 120 acres and is considered to be the largest theme and water park in Southeast Asia. The idea for the water park was to create an oasis from the hustle and bustle of the city, as although Thailand has lots of beaches there are none in Bangkok. The wave pool is now the largest in the world as certified by Guinness World Records and stretches an impressive 13,600 sq m and is the only man made beach in the city. The theme park originally started off with only a few rides, but over the years the owner has expanded and it now has over 30 different rides.

Park

A park is an area of natural, semi-natural, or planted space set aside for human enjoyment and recreation or for the protection of wildlife or natural habitats. It may consist of grassy areas, rocks, soil, and trees, but may also contain buildings and other artifacts such as monuments, fountains or playground structures. In North America, many parks have fields for playing sports such as soccer, baseball and football, and paved areas for games such as basketball. Many parks have trails for walking, biking and other activities. Some parks are built adjacent to bodies of water or watercourses, and these parks may comprise a beach or boat dock area. Often, the smallest parks are in urban areas, where a park may take up only a city block or less. Urban parks often have benches for sitting and they may contain picnic tables and barbecue grills. Parks have differing rules regarding whether dogs can be brought into the park: some parks prohibit dogs; some parks allow them with restrictions (e.g., use of a leash); and some parks, which may be called "dog parks," permit dogs to run off-leash.