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.

Charles "Nish" Bruce

Sergeant Charles Christian Cameron "Nish" Bruce QGM (8 August 1956 – 8 January 2002) was a former British Army soldier and freefall expert of high altitude military parachuting who served in 22 (SAS) Special Air Service (1982–88). He served with the 22 SAS in the Falklands War, on anti-drug operations in South and Central America and in Northern Ireland during Operation Banner for which he was awarded the Queen's Gallantry Medal in 1986.

He received the South Atlantic Medal in 1982 with B Squadron of the 22 Special Air Service and the General Service Medal with the 2nd Battalion, Parachute Regiment for services in Northern Ireland during The Troubles.

Family & Early Life

Bruce was born in Chipping Norton in 1956, middle son of Ewen Anthony Guy Cameron Bruce. He was the paternal grandson of Major Ewen Cameron Bruce (of Blaen-y-cwm).

Military career

Bruce joined the Parachute Regiment in 1973 at age 17 and in 1978 spent 4 years with The Red Devils Display Team participating in test jumping, international exhibitions and competitions before passing SAS selection and joining 22 SAS in April 1982.

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

Witness (1985 film)

Witness is a 1985 American crime thriller film directed by Peter Weir and starring Harrison Ford and Kelly McGillis. The screenplay by William Kelley, Pamela Wallace, and Earl W. Wallace focuses on a detective protecting a young Amish boy who becomes a target after he witnesses a murder in Philadelphia.

The film was nominated for eight Academy Awards and won two, for Best Original Screenplay and Best Film Editing. It was also nominated for seven BAFTA Awards, winning one for Maurice Jarre's score, and was also nominated for six Golden Globe Awards. William Kelley and Earl W. Wallace won the Writers Guild of America Award for Best Original Screenplay and the 1986 Edgar Award for Best Motion Picture Screenplay presented by the Mystery Writers of America.

Plot

Rachel Lapp (McGillis), a young Amish widow, and her 8-year-old son Samuel (Haas) are traveling by train to visit Rachel's sister. Samuel is amazed by the sights in the big city, but at 30th Street Station in Philadelphia, he witnesses two men attack and murder a third (Carhart). Detective John Book (Ford) is assigned to the case and he and his partner, Sergeant Elton Carter (Jennings), question Samuel. The victim was an undercover police officer. Samuel is unable to identify the perpetrator from mug shots or a police lineup, but notices a newspaper clipping with a picture of narcotics officer James McFee (Glover) and recognizes him as one of the killers. John remembers that McFee was previously responsible for a drug raid on expensive chemicals used to make amphetamines, but the evidence had mysteriously disappeared.

Witness (religious newspaper)

Witness was the name of an evangelical newspaper established in 1840 by the Scottish geologist and writer, Hugh Miller. He continued to edit the paper at an office on the Royal Mile in Edinburgh until his suicide in December 1856. He was the principal contributor to the publication, averaging over 10,000 words a week.

References

Witness (Dave Douglas album)

Witness is the 18th album by trumpeter Dave Douglas. It was released on the RCA label in 2001 and features performances by Douglas, Chris Speed, Joe Daley, Mark Feldman, Erik Friedlander, Drew Gress, Bryan Carrott, Michael Sarin, Ikue Mori, Joshua Roseman and Yuka Honda with Tom Waits providing vocals on one track.

Reception