(1) At a track meet, a runner runs the 100–m dash in 13 s. What was the runner’s average speed?
(2) Which is true for an object in free-fall?
(a) It increases in distance proportionally to t2
(b) It has a constant velocity
(c) It has a constant displacement
(d) It has frictional effects
(3) A group of college students eager to get to Florida on a spring break drove the 640-mi trip with only minimum stops. They computed their average speed for the trip to be 58.0 mi/h. How many hours did the trip take?