Concept 1. Distance and time -- meaning 2. The physical quantity representing the motion of an object is numerically equal to that of the object passing through in-

Concept 1. Distance and time -- meaning 2. The physical quantity representing the motion of an object is numerically equal to that of the object passing through in-

1. The significance of distance and time
Distance: the distance that an object moves, such as the distance traveled or driven by a person or vehicle
Time: time is the time interval from the event to the end
2. Speed is a physical quantity that indicates the speed of an object's movement, which is numerically equal to the distance that the object passes in unit time