Which equation represents Newton's second law?

Which equation represents Newton's second law?

• A. F = MA
• B. E = MC^2
• C. V = IR
• D. P = VI

Answer: (A)

Newton's second law describes how motion responds to forces: the net external force acting on an object equals its mass times its acceleration. This means pushing harder on a mass makes it accelerate faster, and a heavier object accelerates more slowly under the same push. The equation F = m a captures that idea, with force in newtons, mass in kilograms, and acceleration in meters per second squared. The direction of the acceleration matches the direction of the net force. In practical terms for aviation, this law explains how engines push the airplane forward, how loads on structures respond to gusts, and why changing mass changes how quickly speed changes under a given thrust or drag. The other formulas belong to different ideas: E = m c^2 is about energy-mass equivalence, V = I R is Ohm’s law for electrical circuits, and P = V I relates electrical power to voltage and current.

Newton's second law describes how motion responds to forces: the net external force acting on an object equals its mass times its acceleration. This means pushing harder on a mass makes it accelerate faster, and a heavier object accelerates more slowly under the same push. The equation F = m a captures that idea, with force in newtons, mass in kilograms, and acceleration in meters per second squared. The direction of the acceleration matches the direction of the net force. In practical terms for aviation, this law explains how engines push the airplane forward, how loads on structures respond to gusts, and why changing mass changes how quickly speed changes under a given thrust or drag. The other formulas belong to different ideas: E = m c^2 is about energy-mass equivalence, V = I R is Ohm’s law for electrical circuits, and P = V I relates electrical power to voltage and current.