Sandra pushed a wooden block and it slid across the floor the wooden block gradually slow down and stopped after moving 10 m why did the block stop moving

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 force it would take to accelerate an 900-kg car at the rate of 6m/s2

Aball horizontally thrown from a cliff at 8m/s