Horizon :
You may have mixed up the topics in the end, if I might say. Yes, velocity is basically speed in a given direction so you are true, but if we looked at your example in the end, it kinda doesn't really link to the topic.
What you talked about in the end was how vehicles experience air resistance, or drag. Drag in simple terms is friction in the air, where the wind going against an object causing it to slow down, change direction, stop and etc. For example, A plane in the air experiences drag due to the wind going against it. The reason why it experiences drag is well, it moves in the air. The air contains very tiny physical molecules. When a plane or any object goes through the wind, these molecules have to go past it. This is how a plane experiences drag. Same reason on how a skydiver slows down whenever he deploys his parachute, as little tiny air molecules are being kind of "collected" underneath the parachute and slowing down the skydiver's descent.
Well, for the good part, you were right with the velocity part. Velocity is basically speed in EVERY direction. Yes, up and down too. I think you did a decent job with the definition, but the example can be altered a little. Maybe I could suggest a potential video where you talk about Drag or maybe even Resultant forces? I hope to see more from you later on. Your videos do set a good reminder for me when I have a science exam coming up, so do keep up the good work.
Peace yo
2026-06-22 00:10:55