In physics, velocity is speed in a given direction. Speed describes only how fast an object is moving, whereas velocity gives both the speed and direction of the object's motion. To have a constant velocity, an object must have a constant speed and motion in a constant direction. Constant direction typically constrains the object to motion in a straight path. A car moving at a constant 20 kilometers per hour in a circular path does not have a constant velocity. The rate of change in velocity is acceleration. Velocity is a vector physical quantity; both magnitude and direction are required to define it. The scalar absolute value (magnitude) of velocity is speed, a quantity that is measured in metres per second (m/s or ms−1) when using the SI (metric) system.
For example, "5 metres per second" is a scalar and not a vector, whereas "5 metres per second east" is a vector. The average velocity v of an object moving through a displacement Failed to parse (Missing texvc executable; please see math/README to configure.): ( \Delta \mathbf{d})
Johnny Marr (born John Martin Maher; 31 October 1963) is an English musician and songwriter. Marr rose to fame in the 1980s as the guitarist in The Smiths, with whom he formed a prolific songwriting partnership with Morrissey. Marr has been a member of Electronic, The The, and Modest Mouse. In 2008, he joined The Cribs after touring with them on 2008's NME Awards Tour, a group in which he would remain until 2011.
Marr's jangly Rickenbacker guitar-playing in The Smiths proved to be popular among other musicians and has influenced many guitarists that followed particularly in the Britpop era.
Marr was voted the fourth best guitarist of the last 30 years in a poll conducted by the BBC in 2010.
Marr was born in Ardwick, Manchester, the son of Irish immigrants. His parents came from Athy in County Kildare. In 1975 he attended the Roman Catholic St Augustine's Grammar School, which in 1977 merged with other schools to form a comprehensive school, St John Plessington High School. Marr had aspirations to be a professional football player, and was approached by Nottingham Forest and had trials with Manchester City (which he supports). In an interview with FourFourTwo magazine, Marr said "I was good enough for City, but they didn't follow up because I was probably the only player out there wearing eyeliner."[citation needed] He currently resides in Manchester with his wife Angie and their children, daughter Sonny and son Nile. Johnny is an honorary board member of Rock For Kids. He is also teetotal and vegan, and runs regularly.
Marty Beller is the drummer for They Might Be Giants. He has two solo albums. He also wrote and sang songs from TMBG's albums, Here Come the ABCs: "Alphabet Lost And Found", Here Come the 123s: "High Five!" and Here Comes Science: "Speed and Velocity".
Beller became the full time drummer for the band in early 2004, breaking the "full house" that the band had before of two Johns and three Dans, after Dan Hickey's departure.
During the 2004 Spine Tour and the 2005 tour, John Flansburgh often introduced him as "the Next President of the United States of America, Mr. Marty Beller!"
On TMBG's 2011 album Album Raises New and Troubling Questions, the fourth song is "Marty Beller Mask" which suggests that TMBG's drummer is actually Whitney Houston wearing a mask of Beller. On the news of Houston's death, TMBG announced that they were retiring the song from public performance.
Beller is married and has two children.
He is also currently the drummer for Jonathan Coulton's new band.
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