#
__VECTORS__

# Vector Basics

**Force**is one of many things that are

**vectors**.

__What the heck is a vector__?- Can you hold it? No.
- Can you watch it? No.
- Does it do anything? Well, not really.

**vector**is a numerical

**value**in a specific

**direction**, and is used in both math and physics.

The

**force vector**describes a specific amount of

**force**and its

**direction**.

- You need both value and direction to have a
**vector**. Both. Very important. Scientists refer to the two values as**direction**and**magnitude**(size). - The alternative to a
**vector**is a scalar.**Scalars**have values, but no direction is needed.**Temperature, mass**, and**energy**are examples of scalars.

When you see

__vectors drawn in physics, they are drawn as arrows__.

- The
__direction of the arrow is the direction of the vector__ - the
.__length of the arrow depends on the magnitude (size) of the vector__

# Real World Vectors

Imagine a situation where you're in a boat or a plane, and you need to plot a course. There aren't streets or signs along the way. You will need to plan your navigation on a map. You know where you're starting and where you want to be. The problem is how to get there. Now it's time to use a couple of vectors.Draw the vector between the two points and start on your way. As you move along your course, you will probably swerve a bit off course because of wind or water currents. Just go back to the map, find your current location, and plot a new vector that will take you to your destination. Captains use vectors (they know the speed and direction) to plot their courses.

# Combining Vectors

You know how to add and subtract. Scientists often use vectors to represent situations graphically. When they have many**vectors**working at once, they draw all the

**vectors**on a piece of paper and put them

**end to end**. When all of the

**vectors**are on paper, they can take the starting and ending points to figure out the answer. The final line they draw (from the start point to the end point) is called the

**Resultant vector**. If you don't like to draw lines, you could always use geometry and trigonometry to solve the problems. It's up to you. Unlike normal adding of numbers, adding vectors can give you different results, depending on the direction of the vectors.