To find recoil in physics, consider the concepts of impulse and momentum. Impulse is the change in momentum of an object and is calculated by multiplying the force applied to the object by the time over which the force is applied. Momentum, in turn, is the product of an object’s mass and velocity. In the context of firearm discharges, recoil is the backward force exerted on the firearm when a bullet is fired. Recoil velocity and momentum can be calculated using the conservation of momentum principle, which states that the total momentum of a system remains constant in the absence of external forces. By analyzing the mass and initial and final velocities of the firearm and bullet, one can determine the recoil velocity and momentum experienced by the firearm.