Answer : The equation most often associated with Newton's Second Law of Motion is,

Step-by-step explanation:
Newton's second law : It is defined as the acceleration of an object is directly proportional to the amount of force applied to it and it is inversely proportional to the mass of an object.
The equation used for Newton's Second Law of Motion is:

where,
a = acceleration of an object
F = force applied on object
m = mass of an object