Luis rushes 40 m towards his truck. He notices he forgot his shoes and returns back to his house. His total travel time is 60 s. What is luis’s average velocity over the 60 s period? And what is luis’s average sped over the 60 s period?

Which of the following is best determined by applying the principles of relativity and uncertainty rather than newtonian physics? a.the velocity of a satellite b.the speed of an object moving at close to the speed of light c.the length of an accelerating race car d.the momentum of a plane