D. A record of all the physical activity you complete in one week.
Explanation:
A "Fitness Log" allows you to keep track of your workout or exercise. Therefore, it is <em><u>a record of the different workout you've managed to complete within a time frame</u></em>. It gives you several information such as the<em> type of workout you've completed, its duration and the time of the day it was performed</em>. This makes a person motivated to exercise because he can see his progress. He may also include <em>his mood before and after workout</em> in order to become more mindful in exercising and many other things.
We know that g = LcosΘ <span>where g, L and Θ are centripetal gravity length, and angle of object </span><span>ω² = g/LcosΘ </span> <span>ω = √(g / LcosΘ) </span>
