Askydiver is in free fall. what is the only force acting upon the skydiver.

Assume that a person skiing high in the mountains at an altitude of h = 15100 ft takes in the same volume of air with each breath as she does while walking at sea level. determine the ratio of the mass of oxygen inhaled for each breath at this high altitude compared to that at sea level. assume that the air composition (i.e. % of air that is oxygen) is the same at sea level as it is at 15100 ft.

The dot diagram represents the motion of the motorcycle as it moves from left to right

Which of the following are guidelines to follow for obtaining accurate observations