Mass and weight clarification | Centripetal force and gravitation | Physics | Khan Academy

Difference between mass and weight. Created by Sal Khan.

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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[narutosramenbuddy]

YOU SIR DESERVE SOME KIND OF "AMAZING PERSON WITH AMAZING TIMING AWARD." my final is in about 12 hours.
i honestly cant that you enough.

[gentlemenRick]

This was the explanation I was looking for. I found two other videos that just didn't get to the point.

Good job mate!

[Nauti_Games]

If anyone asks how much I weigh I'm going to tell them 725 newtons.

Bazinga!

[hadolfitler]

Im really glad that you have videos like this, i felt so confused by kg because i kept thinking about weight, but once you put it in terms of the imperial system it all clicked. Thank you so much

[ivandavidcarmona]

I`ve to say, this video was more practical and understandable than the explanation I received at university. Thanks a lot, for sharing

[poppylolly]

yup my final is also in abt 12 hours also and didnt under stand mass and weight so i would kindly like to say "YOU SIR DESERVE SOME KIND OF "AMAZING PERSON WITH AMAZING TIMING AWARD." i honestly cant that you enough.

[marilynabarracoso]

thank you for teaching us! its very helpful to my test and i got perfect because of you!!

[ninjabagel]

yes, so if your doctor asks for you weight just say "637 newtons" and when they say "oh no I meant in kg" you can say "oh you wanted my mass not my weight, it's 65 kg" :D

[m.n.vijayan]

Thanks sir because of you i am prepared for my physics exam (which is tommorow) Thank you so much for this resource (Please wish me best for tomorow's exam)

[flavioryu]

"assuming that you don't have some type of nuclear reaction going on inside of you" xD

[cyberprodigy]

Hey, Sal. The end of the video, when you are talking about slags is mindblowing (:. Thank you!

[JTheoryScience]

why teach imperial when the rest of the world uses metric in physics... this is how rockets fail my friend.
great video series btw.

[Thermospecialist]

Because the elevator accelerates downwards, during which time the resulting acceleration from gravity becomes less and your weight reduces. Once the elevator has a constant speed, you will have your normal weight again, becoming larger when the elevator slows down to stand still.

[paperbagguy]

thank you for teaching me fraction and

[Thermospecialist]

The simple fact that this is not common knowledge, renders the educational system to be below all criticism.

[abcjme]

You said people give their "weight" to others instead of their mass, as if that's wrong, but I thought scales take into account gravity. In which case, we're not wrong to give our weight.

[Peter_]

He uses kilograms because that's the unit for mass in physics.
In fact it's critical that you use kilograms if you want to get the correct numbers when several different quantities are involved.

[xandroyoung]

Can you give me this formula right now? "A certain force accelerates a 3.6 kg mass by 1.4m/s². What would be the acceleration of 2.2kg mass when the same force acts on it";

[straybluet]

how much do you weigh? 9.8 meters per second squared times 70 kilograms ._.

[Freddyw]

So you determined your mass by using a scale that measures your mass based on the gravity of earth then you turned around and added that force back to the measurement that was created by it in the first place.