Velocity and Speed are Different: Example Problem

This example problem works shows that Velocity and Speed are different. It also illustrates that Speed is Not Velocity without direction.

0:00 Intro
0:16 Reading the Problem
1:10 Translating the problem to physics
1:53 Part (a) Average Speed
2:57 Part (b) Average Velocity
4:34 Speed is Not Velocity without direction

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Gracias a Llorenç Puig por editar las traducciones al español de este video.

この Flipping Physics のビデオに日本語字幕がつきました。小竹知紀さん，協力ありがとう！

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Average Velocity Example Problem with Three Velocities

[eoo]

You always fix my Mistaken concepts. That's why I keep watching your videos.

[silayurdakul]

I'm a sophomore in Turkey and at my school, they don't offer any AP classes but we have physics in Turkish for sure. So I decided that I should start from the beginning to learn and what I'm gonna say is that you are really helpful. A lot of thanks to you for teaching us for free

[bennyko]

This channel is def gonna help me with college calc based physics :)

[Liebe_Zoldyck]

It's kinda easy if you are the teacher.
Thanks for the effort you did making your videos.

[aneeshmathur]

This man hasn't gotten an oscar nomination yet?!?!

[FlippingPhysics]

Dhriti Sharma. Nope. The total distance traveled, as measured by the phone app, is 1.2 km. "travel a distance of 1.2 km and return to his house" means he travels a total distance of 1.2 km and ends back where he started, at his house. It does _not_ mean he traveled 1.2 km away from his house, turns around again and travels another 1.2 km.

Admittedly, I probably could have added the word "total" to "travel a 'total' distance of 1.2 km" to make it a bit clearer, however, I feel the map shown during the video makes it quite clear.

[divyanshloshali]

thanks sir this help me lot . I like your teaching style

[elderboy]

Wait. I have a question? : Is Velocity the average 'speed' of whole journey with direction and Is speed the speed 'during' the journey?

[OkOk-hiih]

instantaneous speed is instantaneous velocity without direction
i think you are using the word 'speed' as average speed
and 'velocity' as average velocity. my book treats speed and velocity unqualified as the instantaneous.

[dhritisharma]

Ummm... isnt the distance 2.4 Km... I mean... travel a distance of 1.2 Km and return to his house...

[harshini]

Thought the distance would be 2400 m since they come back to the house

[yatisoni]

Why we calculate speed with direction is velocity but we know that the speed is distance by time and the velocity is displasment by time so speed with direction as velocity but it's distance not displacement so what's is reason. please solve my।

[eggsamillion]

I vow to discover where you live, fine sir.