When constructing the vector equation for the position vector r (finishing at point P) in the drawing below. Why is it necessary to use a "direction vector", v ? Couldn't one just use vector a and have done with it??(adsbygoogle = window.adsbygoogle || []).push({});

Why do we need to define this new vector r??What is the point.

I would appreciate it if you guys could reply in simple laymans english.

I thank you in advance.

Jon

**Physics Forums - The Fusion of Science and Community**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Why use a Direction Vector?

Loading...

Similar Threads - Direction Vector | Date |
---|---|

I Vector directions applied | Feb 9, 2017 |

Equation of the tangent line in the direction of a vector | Nov 12, 2015 |

Standard unit vector in the positive z direction? | Jun 25, 2015 |

Direction of the maximum gradient (scalar fields) | Oct 14, 2014 |

What if it's not a unit vector in directional derivatives | Jun 30, 2014 |

**Physics Forums - The Fusion of Science and Community**