A generalization of this statement to quantum mechanical operators is known as the Ehrenfest theorem. The motion of simple harmonic oscillators can be described by setting Hooke's law equal to one form of this statement, and when mass is not constant, one side of it is rewritten as the time derivative of momentum. Free body diagrams are often used in conjunction with this statement, and weight is 
A generalization of this statement to quantum mechanical operators is known as the Ehrenfest theorem. The motion of simple harmonic oscillators can be described by setting Hooke's law equal to one form of this statement, and when mass is not constant, one side of it is rewritten as the time derivative of momentum. Free body diagrams are often used in conjunction with this statement, and weight is found by replacing one term in this law with a constant approximately equal to 9.8 meters per second squared. For 10 points, name this law of motion which states that force is equal to mass times acceleration.
A generalization of this statement to quantum mechanical operators is known as the Ehrenfest theorem.
Newton's Second Law of Motion [prompt on partial answer]