Question

“If external force on a body is zero, its acceleration is also zero” is a statement of consequence of the​

Answer 1

Newton's second law of motion

Answer 2

The given statement is a consequence of the Newton's second law of motion.

• Newton's second law of motion established the mathematical relationship between the applied force on a body and mass, acceleration of that body.
• The mathematical relationship is :

F = ma

(F = Force, m = Mass , a = acceleration.)

• Now, if force becomes zero, then from the above mentioned mathematical relationship, we can say that either mass will be zero or the acceleration will be zero.
• But, the mass of a body cannot be zero. That's why, zero amount of force is the reason behind the zero acceleration of that body.
• This whole thing, is based upon the Newton's second law of motion.