# Average velocity= displacement/time

Hey,

I just some clarification for kinematics:
am i correct to say that:

average velocity= displacement/time
average speed=total distance/time

?

SpaceTiger
Staff Emeritus
Gold Member
jen333 said:
average velocity= displacement/time
average speed=total distance/time

The difference between velocity and speed is just that velocity is a vector and speed is a scalar. That is, velocity has a direction and magnitude, while speed is just the magnitude. For example, you might say that your speed is 2 m/s, while your velocity is [2,0,0] m/s (or 2 m/s in the x direction).

Chi Meson
Homework Helper
jen333,

Your statement is perhaps "correct enough" if you just want a general distinction between velocity and speed. As a whole what you say is not incorrect, I would rate it as incomplete if this was offered as the definitions for velocity and speed.

jen333 said:
Hey,

I just some clarification for kinematics:
am i correct to say that:

average velocity= displacement/time
average speed=total distance/time

?
yes that is absolutely correct.

a person that runs around a circular track and stops where he began has zero average velocity but non-zero average speed.

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