Tangential Velocity in Circular Motion (Clip) | Physics - Kinematics

[@physicslab42]

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[@senshi5274]

These videos are surprisingly high quality for a small channel. Would you ever consider on making videos on more advanced topics? (Thermodynamics, Quantum physics, fluid mechanics, etc)

[@physicslab42]

Thanks I appreciate it! I'm starting out with algebra-based mechanics but I would definitely consider other physics topics and making more advanced videos down the road. I'll probably cover electricity and magnetism after I'm done with mechanics.

[@mrigyank_]

i understand why we use a tangential line to describe the linear velocity's direction but why cant we use the same for displacement?? why is linear displacement's direction described as the arc of the circular track and not the tangent because the direction of velocity vector should be same as displacement right?

[@physicslab42]

That's a great question! I'm not sure if I have a good answer for you, some of it just comes down to the words we use to describe different things. The word "displacement" by itself already has a definition, which is the straight line distance between a start and end point. For example if a car drove 1/4 of the way around a circle, it's "displacement" is the straight line distance between the two points and I use the words "tangential displacement" to describe the arc length of the car's path. I could have just used "arc length" or "distance" instead, but I used "tangential displacement" because displacement is a vector which can be positive or negative, and we need to include whether that arc length is positive or negative based on the axis we set up. For an object in circular motion the "tangential displacement" will always be an arc length that curves around a circle, so it can't be along a straight line tangent to the circle. If an object was moving in a straight line then the displacement would be in the same direction as the velocity. But for an object in circular motion the direction of the tangential velocity is constantly changing, so the displacement is not in the same straight line direction as the velocity (there is no single direction of the velocity). I can see how this stuff can be confusing, hopefully that helps a little bit!

[@mrigyank_]

@@physicslab42 thanks a lot very helpful dude