Speed
Formula: S = distance / time
Speed is a measure of how quickly an object moves from one place to another. It is usually given in terms of distance divided by time. In the formula, S represents speed, distance is the total distance traveled, and time is the time taken to cover that distance. If the time is zero, the speed is undefined, which is why the test with '0,0' gives a null result. The units of speed will be determined by the units of distance and time (e.g., meters per second, kilometers per hour).
Speed is a fundamental concept in physics, and it's also widely used in everyday life. Calculating the speed of a vehicle is a common example where this formula might be applied. It can also be useful in other contexts such as athletes tracking their running speed, or during various forms of travel to estimate arrival times.