Position vs. time graphs | One-dimensional motion | Physics | Khan Academy

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David explains how to read a position vs. time graph. He then explains how to use the graph to determine the following quantities: displacement, distance, average velocity, average speed, instantaneous velocity, and instantaneous speed.

Physics on Khan Academy: Physics is the study of the basic principles that govern the physical world around us. We'll start by looking at motion itself. Then, we'll learn about forces, momentum, energy, and other concepts in lots of different physical situations. To get the most out of physics, you'll need a solid understanding of algebra and a basic understanding of trigonometry.

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Best, Fun Explanation for the right audience like me, who was bored to death about physics. I made it through a 15min video!!! Thank You!

ddang

I like this instructor, he's entertaining

ChristinaKilgore

that is such a cute turtle (I love turtles) ! tks it is really easy to understand

johngrimsud

"Physicists love this, teachers love this--"

And as a sophomore in a room of juniors and seniors who knew what they were doing, I am dead.

neruneru

'Oooh its a pink helmet... She's pretty'😂😂😂

familytingzoyea

lol...you just made me think positive about my physics...now ill just remember turtles in my exam

-wonqs

Dear Sal Khan,

I hope your year is off to a great start! I am learning Physics now, and my teachers are having me watch this video. I must say, it is very well made! Thank you for all you have done for students around the globe.

With gratitude,
Ezra

P.S. Please consider teaching at our school. We would be happy to have you!

ezraglasman

*There was no distance travelled. That was the awkward part*
'Cause it might hurt feelings' LMAO WHAT

xanderia

Thank you for caring for the turtle's safty!
The turtle should have read the intructions on her jet pack before launching into space...

mcu

I love silly examples. They usually stay in head a lot more than regular ones.

ayounglad

I had so many on the list on my pointers to review about this and you just put it in one video, tysm!!

leonadawn

HUGE HELP thankyou!! I have online classes so it's nice to see it instead of read it

aaronivey

I had a quick question about what the INSTANTANEOUS VELOCITY of the turtle would be at "t= 4 seconds"? Because there's a corner and according to calculus, when you have a "CORNER" or a "CUSP" in the graph, it has "NO DERIVATIVE", that is you CANNOT DETERMINE the SLOPE of a "CORNER/END POINT/ CUSP". Besides, this graph CHANGES slope SUDDENLY at t=4 seconds. So, can we determine the instantaneous velocity at t= 4 seconds?

dibbyabarua