Linear momentum applies to both bodies with uniform velocity and bodies with variable velocity. The concept of linear momentum is defined as the product of an object's mass and its velocity. Mathematically, linear momentum (p) is expressed as:
p = m * v
Where: p is the linear momentum, m is the mass of the object, and v is the velocity of the object.
Regardless of whether the velocity is constant (uniform) or changing (variable), the linear momentum remains a relevant physical quantity. In the case of variable velocity, the linear momentum can change as the velocity changes, reflecting the object's changing motion.
It's important to note that for objects with variable velocity, the rate of change of momentum is related to the net force acting on the object. According to Newton's second law of motion, the net force is equal to the rate of change of momentum:
F = dp/dt
Where: F is the net force acting on the object, dp/dt represents the derivative of momentum with respect to time.
In summary, linear momentum is applicable to both bodies with uniform velocity and bodies with variable velocity. It is a fundamental concept in classical mechanics and is closely related to the net force acting on an object.