Final answer:
The relationship between the amount of force needed to move an object and that object's mass is described by Newton's second law of motion, which states that the force exerted on an object is equal to its mass multiplied by its acceleration.
Step-by-step explanation:
The relationship between the amount of force needed to move an object and that object's mass is described by Newton's second law of motion, which states that the force exerted on an object is equal to its mass multiplied by its acceleration. This relationship can be represented by the equation F = ma. According to this equation, if the mass of an object increases, the amount of force required to move it also increases, assuming the acceleration remains constant.