Question

The physical principle used for the derivation of momentum equation is

• A. First law of thermodynamics
• B. Second law of thermodynamics
• C. Newton's second law
• D. Law of conservation of mass

Hint:

Remember that Newton's second law forms the basis of many fundamental equations in physics and engineering, including the momentum equation, making it a critical principle across disciplines.

Answer 1

The Correct Option is C

The momentum equation in physics, particularly in fluid dynamics, is derived from Newton's second law of motion, which states that the force acting on an object is equal to the mass of the object multiplied by its acceleration (\( F = ma \)). In fluid dynamics, this principle is extended to the flow of fluids, modifying it to account for the continuous distribution of mass and the forces acting on it.