Suppose that the moment of inertia of a skater with arms out and one leg extended is 3.3 kg⋅m2 and for arms and legs in is 0.90 kg⋅m2 . If she starts out spinning at 4.2 rev/s , what is her angular speed (in rev/s) when her arms and one leg open outward?

A2-kg bowling ball is 2.5 meters off the ground on a post when it falls. just before it reaches the ground, it is traveling 7 m/s. assuming that there is no air resistance, which statement is true?

Who was the first scientist to measure speed as distance over time?

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.