Speed

In everyday use and in kinematics, the speed of an object is the magnitude of its velocity (the rate of change of its position); it is thus a scalar quantity. The average speed of an object in an interval of time is the distance travelled by the object divided by the duration of the interval; the instantaneous speed is the limit of the average speed as the duration of the time interval approaches zero.

单词	Pokily
释义	Pokily 英语百科 Speed In everyday use and in kinematics, the speed of an object is the magnitude of its velocity (the rate of change of its position); it is thus a scalar quantity. The average speed of an object in an interval of time is the distance travelled by the object divided by the duration of the interval; the instantaneous speed is the limit of the average speed as the duration of the time interval approaches zero.
随便看	period of endogenous respiration period of endurance period of ergodic class period of exhaust period of existence period of expansion period of extension period of fetus period of filter service period of flaming period of folding period of forecast period of formal operations period of free oscillation period of freezing weather period of gestation period of grace period of growth period of guarantee period of gymnosperms period of half chang period of half change period of half decay period of heating period of hire

Pokily

Speed