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Which law of physics explains the recoil of a gun when a bullet is fired?
Newton's First Law
Newton's Second Law
Newton's Third Law
Law of Gravitation
Newton's Third Law
The recoil of a gun is a classic demonstration of Newton's Third Law of Motion, which states that for every action, there is an equal and opposite reaction. When the gun exerts a forward force on the bullet, the bullet exerts an equal magnitude force on the gun in the backward direction.
The recoil of a gun is a classic demonstration of Newton's Third Law of Motion, which states that for every action, there is an equal and opposite reaction. When the gun exerts a forward force on the bullet, the bullet exerts an equal magnitude force on the gun in the backward direction.
It is like standing on a frictionless skateboard and throwing a heavy medicine ball forward; you will naturally roll backward as you push the ball away.
ACTION-REACTION: Every ACTION triggers an REACTION of equal magnitude but opposite direction.
mbтАЛvbтАЛ=тИТMgтАЛVgтАЛ тАФ Principle of conservation of momentum where m,M are masses and v,V are velocities
F12тАЛ=тИТF21тАЛ тАФ Mathematical representation of Newton's Third Law
According to the Law of Conservation of Momentum, the total momentum of the gun-bullet system remains constant. Before firing, both are at rest (momentum = 0). When the bullet is fired with forward momentum mbulletтАЛ├ЧvbulletтАЛ, the gun must acquire an equal and opposite momentum MgunтАЛ├ЧVrecoilтАЛ such that the vector sum is zero: mbulletтАЛ├ЧvbulletтАЛ+MgunтАЛ├ЧVrecoilтАЛ=0.
Recoil velocity is inversely proportional to the mass of the gun.
Forces of action and reaction act on different bodies, hence they do not cancel each other out.
The process occurs in an isolated system to conserve linear momentum.
Used to measure muzzle velocity
Fundamental for ballistics analysis
Recoil can cause injury to the shooter if not handled properly
Increases the difficulty of maintaining aim
Rocket propulsion
Jet engine thrust
The recoil velocity VgтАЛ=тИТMgтАЛmbтАЛvbтАЛтАЛ.
Option A (First Law) relates to inertia, Option B (Second Law) relates to F=ma, and Option D describes gravitational attraction between masses.
C is correct тАФ The recoil of a gun is a direct result of Newton's Third Law of Motion where the explosive force creates an action-reaction pair between the bullet and the gun.
Always remember that in recoil problems, even though the forces are equal, the acceleration of the gun is much smaller than the bullet due to its significantly larger mass (a=F/m).
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