Is the measurement of the rate at which bodies move.  It is calculated as the ratio between the displacement and the time used. Its units in the International System (SI) are m/s. 

v = x final -x initial/t₂ - t₁

É a relación entre o desprazamento e o tempo empregado.

1. With the help of your partner, indicate which animal runs faster:

a) A wolf that runs 200 metres in 12 seconds.

b) A grey squirrel that runs 45 metres in 3,75 s. 

No SI mídese en m/s, pero tamén é común medila en km/h.