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.

Free fall (disambiguation)

Free fall is the ability to achieve the sensation of weightlessness (for example to be falling freely in an atmosphere, or to be in zero-g). In skydiving, the term freefall is also used for the portion of the skydive prior to the deployment of a parachute, even though significant portions of it are at terminal velocity rather than freely accelerating in gravity.

Free fall, Free-fall or Freefall may also refer to:

Books & comics

The Unit (season 2)

The second season of The Unit originally broadcast between September 19, 2006 and May 8, 2007, it introduces several new characters to the series. Tiffy has trouble with the law when she covers for Colonel Ryan's wife, Charlotte, and The Unit is investigated by the CIA over infractions that could result in criminal charges.

Cast and characters

Main cast

Supporting cast

Recurring cast

Believe (Emerson Drive album)

Believe is the sixth studio album by Canadian country music group Emerson Drive. The album was released in Canada on May 5, 2009 via Midas/Valory/Open Road. The album's first single, "Belongs to You," reached the top forty on the Billboard Hot Country Songs chart in the United States.

Critical reception

The album received mixed reviews from music critics. It received a three-and-a-half star rating from Todd Sterling of AllMusic, who said that the album was "slickly produced" and that it "sticks to the well-worn formula of the group's previous releases," but said that it had "every color of the musical rainbow." Sterling cited "Your Last" as a standout, calling it a "lump-in-the-throat masterpiece." Jim Malec of The 9513 gave it one star out of five, referring to the song's lyrics as largely cliché in nature and saying, "There is not a single song on Believe worth hearing. It is an entirely disposable album that is unoriginal, uninteresting and unnecessary." Malec also criticized the album's sound, saying that the mixing of instruments and Brad Mates' vocals did not seem cohesive.

Believe (Elton John song)

"Believe" is a 1994 song recorded by Elton John. It was the first single from his album Made in England and was released on 20 February 1995. It reached #1 in Canada. In the US, "Believe" was Elton John's fifteenth number one on the Adult Contemporary chart and also went to number thirteen on the Billboard Hot 100. It gave him his third straight top twenty single in the US, with his two hit singles from Disney's The Lion King preceding it. In Europe, it was a top twenty hit in Switzerland, UK, France and Belgium (Wallonia) and achieved moderate success in several other countries. The songs which feature as B-side were recorded at the Greek Theatre, in Los Angeles.

The music video for the song was entirely in black-and-white and shot in London, featuring shots of the Believe Wall in the beginning and end of the video.

Track listings

Ocean Avenue (album)

Ocean Avenue is the fourth studio album by the American rock band Yellowcard. The album was the band's major-label debut and brought them to prominence. It was a commercial success in the United States, led by titular hit single "Ocean Avenue". The album received generally positive reviews from music critics and has been certified platinum in sales by the RIAA and gold by the CRIA. It was produced by Neal Avron, and released on July 22, 2003 through Capitol Records.

In 2013, the band released an acoustic version of the album, Ocean Avenue Acoustic, in honor of the album's tenth anniversary.

Commercial performance and promotion

Ocean Avenue sold 11,000 copies in its first week in the U.S., debuting at #23. It is Yellowcard's most successful album and has been certified Platinum for sales in excess of 1,000,000. It was released as an enhanced CD in some countries. The enhanced CD includes a video entitled "The Making of Ocean Avenue" and a previously unreleased video of the song "Powder" (from The Underdog EP). In 2005, the album was released as a Special Edition in Malaysia, with live videos and music videos. The album was re-released on limited edition vinyl in 2011.