An Introductory Relative Motion Problem

Using a toy car and a piece of paper we can visualize and understand relative motion by doing an introductory problem.

0:00 Intro
0:13 Reading the problem
0:42 Translating the problem
1:38 Visualizing the problem
2:24 The vector diagram and equation
3:14 Isn’t this vector addition?
3:30 Solving for the velocity of the car with respect to the Earth
4:44 Solving for the direction of the car with respect to the Earth
6:32 Part (b) How far did the car travel?
7:15 New similar triangle with displacements
8:15 Solving part (b)
9:58 Solving part (c) How long did the car travel?
10:58 An alternate solution to part (c)
11:36 Yes, it did take about 15 seconds

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An introductory Relative Motion Problem with Vector Components

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Introduction to Relative Motion using a Quadcopter Drone

[FlippingPhysics]

The best way to understand relative motion is to be able to visualize it.  Therefore I used a large piece of paper and a slow moving toy car to create a simple, introductory vector addition problem that we can actually see. #PhysicsED #flipclass

[ahmed]

That's lots of work you're putting in. I really appreciate that, Kudos! and nice socks!

[DisiCoco-nmgw]

YES I UNDESTAND finally what the velocity of the respect to the paper is 😢❤

[Adumbb]

how do you know if it’s 58 degrees west of north or 32degrees north of west? how do we know the direction is counterclockwise?

[samisiddiqi]

These are genuinely fun to watch, and spare no detail.

[sjaoenvf]

6:43 question is in cm but diagram is in mm. (awesome videos BTW. I sometimes forgot billy, bobby and bo are you)

[arafe-zawad-sajid]

Hi. Can you please tell me why we used the Pythagorean theorem to solve for the velocity of the car with respect to the Earth(Vce) @3:30 instead of just doing Vce=Vcp+Vpe

[juliojuarez]

i didn't understand how you turned velocities into the length of x
cos=a/h when adjacent was given. We know the angles of the velocity triangle but i thought they had nothing in common with the displacement triangle

[anshur]

I can't believe that you have only this much views

[VeerSingh-fuln]

Sir can you please help out with optics.

[helifynoe]

I prefer motion relative to space-time. Looking at motion in this way, you can use simple geometry to construct some fascinating mathematical representations of that which is the outcome of this 4D motion that takes place within the 4D space-time environment. Then, once having done that, you end up being completely surprised that you came up with the same results as did Einstein, even though you knew nothing about physics at all.

[kimsahl]

Rest and motion is't about relativity (or absolute), it is just "rest" and "motion". Simple.