The law that describes the relationship between mass, force, and acceleration is Newton's Second Law of Motion.

It states:

The acceleration of an object is directly proportional to the net force acting on the object and inversely proportional to its mass.

Mathematically, this is represented as:

F = ma

Where:

* F is the net force acting on the object

* m is the mass of the object

* a is the acceleration of the object

This means that:

* A larger force is required to accelerate a heavier object (larger mass) at the same rate as a lighter object.

* A heavier object will accelerate slower than a lighter object with the same force applied.