Final answer:
Descartes' 'quality of motion' and modern momentum are related concepts, but they differ in their approach to describing motion. Descartes' concept is qualitative, while modern momentum is a quantitative measurement.
Step-by-step explanation:
Descartes' 'quality of motion' and modern momentum are similar in the sense that they both describe the motion of an object. However, there are some differences between the two concepts.
Descartes' 'quality of motion' refers to the idea that an object's motion is directly related to its mass and speed. It is a qualitative description of motion.
On the other hand, modern momentum, as described by Newton's second law of motion, is a quantitative measurement of an object's motion. It takes into account both the object's mass and its velocity.
In other words, while Descartes' 'quality of motion' focuses on the qualitative aspects of motion, modern momentum provides a precise and quantitative measure of an object's motion.