Speed is a scalar quantity. So you can only say e.g.: "my car can go 20 mph".

On the contrary velocity is a vector
quantity so it does not include only magnitude of speed but also a direction. Example for this would be: "object is
moving 2.6 m/s north."

\( v_a \) | is average velocity |

\( v \) | is velocity |

\( v_0 \) | is initial velocity |

\( v_0 \) | is initial velocity |

\( v_a \) | is average velocity |

\( v \) | is velocity |

\( v \) | is velocity |

\( v_0 \) | is initial velocity |

\( v_a \) | is average velocity |