## Newton's Second Law

Newton’s Second Law:

The acceleration of an object is proportional to the resultant force acting on the object, and inversely proportional to the mass of the object.

As an equation:

resultant force = mass × acceleration

force, F, in newtons,

N mass, m, in kilograms, kg

acceleration, a, in metres per second squared, m/s^2

Inertial mass is a measure of how difficult it is to change the velocity of an object

Inertial mass is defined as the ratio of force over acceleration.