Final answer:
The application of Newton's second law to calculate the force acting on a runner with a given mass and acceleration.
Step-by-step explanation:
Acceleration and Newton's second law of motion, a runner who has a mass of 75 kg and accelerates at a rate of 0.15 m/s2 to the west. To determine the force acting on the runner, we would use Newton's second law, which states that the force acting on an object is equal to the mass of the object multiplied by its acceleration (F = ma).
In this case, the force would be calculated as 75 kg × 0.15 m/s2, resulting in a force of 11.25 N directed toward the west.