Which of the following is the
correct formula for the speed of an object? (A) Speed equals distance moved
multiplied by time moved for. (B) Speed equals distance moved
divided by time moved for. (C) Speed equals time moved for
divided by distance moved.
To see which formula is correct,
let’s think about an object in motion. The faster this object moves, the
greater its speed will be. A higher speed means the object
moves a greater distance in the same amount of time. Or the object could move the same
distance but take less time. We can say the object’s speed
increases in two different cases: first, when it moves a greater distance in the
same amount of time and second when it moves the same distance in less time. Looking at our answer choices, the
only one that is true for both of these conditions is option (B) speed equals
distance moved divided by time moved for.