The Speed, Distance, Time Formula
The fundamental relationship between speed, distance, and time is: Distance = Speed × Time (d = s × t). Rearranged: Speed = Distance/Time (s = d/t), and Time = Distance/Speed (t = d/s).
For a car traveling 65 mph for 3 hours: d = 65 × 3 = 195 miles. For a 300-mile trip at 75 mph: t = 300/75 = 4 hours. For traveling 150 miles in 2.5 hours: s = 150/2.5 = 60 mph.
This formula assumes constant speed — a simplification that works well for estimates but not for precise physics calculations involving acceleration. In classical mechanics, when speed varies, the relationship involves integration of velocity over time.