Recoil (often called knockback, kickback or simply kick) is the backward momentum of a gun when it is discharged. In technical terms, the recoil caused by the gun exactly balances the forward momentum of the projectile and exhaust gases (ejecta), according to Newton's third law. In most small arms, the momentum is transferred to the ground through the body of the shooter; while in heavier guns such as mounted machine guns or cannons, the momentum is transferred to the ground through its mount. In order to bring the gun to a halt, a forward counter-recoil force must be applied to the gun over a period of time. Generally, the counter-recoil force is smaller than the recoil force, and is applied over a time period that is longer than the time that the recoil force is being applied (i.e. the time during which the ejecta are still in the barrel of the gun). This imbalance of forces causes the gun to move backward until it is motionless.
A change in momentum results in a force, which according to Newton's second law is equal to the time derivative of the momentum of the gun. The momentum is equal to the mass of the gun multiplied by its velocity. This backward momentum is equal in magnitude, by the law of conservation of momentum, to the forward momentum of the ejecta (projectile(s), wad, propellant gases, etc...) from the gun. If the mass and velocity of the ejecta are known, it is possible to calculate a gun’s momentum and thus the energy. In practice, it is often simpler to derive the gun’s energy directly with a reading from a ballistic pendulum or ballistic chronograph.
Recoil is a musical project created by former Depeche Mode member Alan Wilder. Essentially a solo venture, Recoil began whilst Wilder was still in Depeche Mode as an outlet for his experimental, less pop-oriented compositions. Once he announced his departure from the group in 1995, Recoil was transformed from a small side-project into Wilder's primary musical enterprise.
Recoil began in 1986, when Daniel Miller (record producer and founder of Mute Records) heard some of Alan Wilder's demo recordings, which he had made on a 4-track cassette machine. These recordings were substantially different from anything Depeche Mode had released — whilst they were still created using synthesizers and sampling, they featured little of Depeche Mode's catchy pop songwriting, instead opting for an experimental, John Cage-esque style. Due to the primitive and decidedly uncommercial nature of these pieces, Wilder and the record label decided to release the album inconspicuously, naming it 1 + 2. It eventually came out in mid-1986, not long after the release of Depeche Mode's well-received Black Celebration.
Recoil is the backward momentum of a gun when it is discharged.
Recoil may also refer to:
Five thousand years, that's a lotta tears
and your world's still crumblin' down
So full of hate, you've sealed your fate
and your world's still crumblin' down
So many scars after all the wars and wars and wars
and your world's still crumblin' down
Your battle cry echoes as you die
and your world's still crumblin' down
The rockets fly across the sky
and your world's still crumblin' down
You take and take, for heaven's sake
and your world's still crumblin' down
You only feel the pain you deal and deal and deal
and your world's still crumblin' down
Peace can't be known, that dove has flown