Hey, folks. So we're going to be working a lot with vectors in later videos. In this video, I just wanted to quickly review the difference between vectors and scalars just in case it's been some time since you've seen this stuff. Let's check it out. Remember that the basic idea is that when you take measurements in physics, you always get the size, the magnitude of the measurement, or how much. It's basically just the number that you get when you're measuring something. And remember that some measurements also have direction. And measurements with direction are called vectors. That's magnitude and direction. Whereas numbers without direction, so just the number only, are called scalars. We saw a bunch of examples of this. Let's check it out. For instance, if you were to take a thermometer outside and you measure at 60 degrees Fahrenheit, you're measuring temperature. Well, that's the magnitude, but it doesn't make sense to ask which direction those 60 degrees go. You don't have a direction. And so, therefore, this is a scalar.

Now, let's say you were to push a box somewhere and you're pushing with 100 Newtons North. So that's 100 Newtons, which means that you have the magnitude, but you also have the direction. You're pushing in the north direction. So, that means that this is both, and this is a vector, so force is a vector. Then we saw some specific examples that dealt with how far you're moving or how far you're traveling. We saw distance versus displacement. The basic difference is that if you were to tell somebody I walked for 10 meters, that 10 meters is the magnitude, but you don't know which direction you’re going in. No direction, so, therefore, this is a scalar. But then if you tell your friend I walked 10 meters east, well, now you have both. Now you're talking about the magnitude and the direction and, therefore, this is a vector.

And then, we also saw two examples of how fast you're moving, and this was speed and velocity, and they were kind of related to distance and displacement. If you tell your friend I'm driving 80 miles per hour, that doesn't tell us which direction. We just have magnitude only, without the direction. So it's a scalar. But then if you say, well, I drove 80 miles per hour in the west direction. So now you have both magnitude and direction and, therefore, it's a vector. Alright, guys. That's the basic difference between vectors and scalars. That's it for this one.