@@FlippingPhysics it went alright! Not as horrible it could have been worse that's for sure. But your video helped me get a couple questions right that I think I would have got wrong so thank you for what you do!:)
Although they are often represented as the same in the media, Weight and Mass are Not the Same! Thank you Derek Muller of Veritasium for letting my use a 10 second clip from one of your videos where you refer to your weight in kilograms. #PhysicsED #flipclass
its your weight the force of gravity on your body now for your mass its static thing calculated by ur volume and density so your weight on moon will be weight =Fg at moon= mass x g of moon
@@Noahsorman Depends on what kind of scale you are talking about. A physician's balance compares your weight to the weight of a reference mass, and since everyone brought gravity to the party, the device measures your mass independent of the gravitational field, as long as there is one. A spring scale by contrast, measures the constraint force needed for a spring to support your weight, and will change if there is a different gravitational field.
I am way ahead of you. became a patron last month from your website. I just make sure to watch/comment on TH-cam as well so your videos have a better chance of being seen by others. cheers!
Ah ha! I new the name looked familiar. Sorry I didn't recognize you on TH-cam as one of my prized Patreon Supporters. Thanks so much for recognizing that TH-cam comments can help move my videos from being a "hidden gem" to ... "an obvious gem"?
Can you answer one question for me then? I fully understand the idea of weight vs mass, but the unit is throwing me off... in your Earth vs. Moon example, you said your weight on the moon 26 lbs, and there is a ratio between pounds and kilograms which is 1kg is approximately 2.2 lbs, However, if pounds are WEIGHT (vector) and kilograms are MASS (scalar) then why is there a constant that can be used to convert?
+Matthew Mallory 1 kg equals 2.2 lbs is only true on the surface of planet Earth and ignores the direction of weight. Therefore, I wouldn't actually call this a conversion factor, because it is only true in a specific location and only deals with the magnitude of the weight. Hope that helps!
If we cannot say that my weight = 70 kg then how can we say that my weight = 155 lb. Does it mean that pounds take into consideration acceleration due to gravity. I am clear about weight and mass after watching your video Mr.P, but i am confused between mass in kg and weight in pounds. Please help Mr.P
Kilograms are SI units and pounds are English units. Sounds like your confusing your unit systems of measurement. SI: mass in kg and weight in newtons. English: Mass in slugs and weight in pounds.
@@FlippingPhysics Ohh, got it Mr.P. In india we mostly use S.I units so was getting confused about pounds. Thanks a lot Mr.P . Learnt a new thing today.
@@Mech.Masters Very few people in the US have ever used a slug in their entire life. I've never seen any device calibrated in slugs, or ever seen a product sold by the slug. I would have to look up what a slug is, to have any concept of how much mass it measures. I understand what advantages it has in theory, but I rarely ever see it in practice. Whereas I have an intuitive understanding for the size scale of pounds, kilograms, and Newtons, and I've seen practical examples of all these units used in practice. You end up preferring Newtons and kilograms for Newton's second law calculations anyway.
Well... Scales already divide weight by g? So they mostly compare mass accurately. (I believe generally when people refer to weight they refer to it on a weighing scale.)
Depends on what kind of scale you are talking about. A scale that compares weight to another kind of force, like a spring force, will not measure mass directly. The scales that are calibrated in a unit with the same name as a mass unit, divide by an assumed Earth standard value of g. The value of g varies by +/-0.3% by location, so if you need 3 significant figures in your answer, you need to account for gravity's local value specifically instead of the global average. However, if you use a balance instead of a scale, comparing weight to the weight of a reference object, you will measure your mass more directly. The gravity "cancels out of the equation", and you get the same read-out, no matter what gravitational field is present, as long as there is one.
@@carultch sorry uh.. this comment was a year back when I was still in school(in an undergrad course now). I was referring to scales like the balancing ones.
Sadly, in English units, there are two terms "pound-force" and "pound-mass" which, for obvious reasons, often get confused. When physicists refer to "pounds" we are referring to "pound-force", because 1 pound refers to the force of gravity exerted on 1 slug of mass here on planet Earth. hyperphysics.phy-astr.gsu.edu/hbase/mechanics/slug.html
Just a request sir could you not just throw books, in India here we respect books a lot and seeing the this just doesn't feel good well not hate just a humble request
Studying for a physics test and just wanted to say this help me also it was entertaining too! Really enjoyed that teaching style done really well
I hope the test went well!
@@FlippingPhysics it went alright! Not as horrible it could have been worse that's for sure. But your video helped me get a couple questions right that I think I would have got wrong so thank you for what you do!:)
At the risk of misspeaking, I'd have to say this is one of the heavier philosophical explorations I've seen under the rubric of physics. :)
You're an awesome teacher and a lot better than an old textbook, keep on going!
+Paulie Dimples Thanks!
Love your videos we use them suggested by our AP physics teacher to learn better! And I always find myself singing the intro (:
+merp saturn That's cool. You sing my theme song.
Although they are often represented as the same in the media, Weight and Mass are Not the Same! Thank you Derek Muller of Veritasium for letting my use a 10 second clip from one of your videos where you refer to your weight in kilograms. #PhysicsED #flipclass
So If stand on a Weight scale and it shows 70kg; is that my actual mass? or is my mass 70 divided by 9.82?
its your weight
the force of gravity on your body
now for your mass its static thing calculated by ur volume and density
so your weight on moon will be
weight =Fg at moon= mass x g of moon
@@Noahsorman Depends on what kind of scale you are talking about. A physician's balance compares your weight to the weight of a reference mass, and since everyone brought gravity to the party, the device measures your mass independent of the gravitational field, as long as there is one. A spring scale by contrast, measures the constraint force needed for a spring to support your weight, and will change if there is a different gravitational field.
In college to become a Physicist, and you are my physics teacher (I gave up on the one I am paying tuition for a month ago).
Sounds great. Any chance you could toss a teeny percentage of that tuition money my way? www.patreon.com/FlippingPhysics
I am way ahead of you. became a patron last month from your website. I just make sure to watch/comment on TH-cam as well so your videos have a better chance of being seen by others. cheers!
Ah ha! I new the name looked familiar. Sorry I didn't recognize you on TH-cam as one of my prized Patreon Supporters. Thanks so much for recognizing that TH-cam comments can help move my videos from being a "hidden gem" to ... "an obvious gem"?
You are good and great
Can you answer one question for me then? I fully understand the idea of weight vs mass, but the unit is throwing me off... in your Earth vs. Moon example, you said your weight on the moon 26 lbs, and there is a ratio between pounds and kilograms which is 1kg is approximately 2.2 lbs, However, if pounds are WEIGHT (vector) and kilograms are MASS (scalar) then why is there a constant that can be used to convert?
+Matthew Mallory 1 kg equals 2.2 lbs is only true on the surface of planet Earth and ignores the direction of weight. Therefore, I wouldn't actually call this a conversion factor, because it is only true in a specific location and only deals with the magnitude of the weight. Hope that helps!
Awesome videos!
Thanks! I do my best. 😊
great video
Correct man👍
If we cannot say that my weight = 70 kg then how can we say that my weight = 155 lb. Does it mean that pounds take into consideration acceleration due to gravity. I am clear about weight and mass after watching your video Mr.P, but i am confused between mass in kg and weight in pounds. Please help Mr.P
Kilograms are SI units and pounds are English units. Sounds like your confusing your unit systems of measurement.
SI: mass in kg and weight in newtons.
English: Mass in slugs and weight in pounds.
@@FlippingPhysics Ohh, got it Mr.P. In india we mostly use S.I units so was getting confused about pounds. Thanks a lot Mr.P . Learnt a new thing today.
I wish we used S.I. units instead of the silly English ones.
@@Mech.Masters Very few people in the US have ever used a slug in their entire life. I've never seen any device calibrated in slugs, or ever seen a product sold by the slug. I would have to look up what a slug is, to have any concept of how much mass it measures. I understand what advantages it has in theory, but I rarely ever see it in practice. Whereas I have an intuitive understanding for the size scale of pounds, kilograms, and Newtons, and I've seen practical examples of all these units used in practice. You end up preferring Newtons and kilograms for Newton's second law calculations anyway.
Well...
Scales already divide weight by g?
So they mostly compare mass accurately.
(I believe generally when people refer to weight they refer to it on a weighing scale.)
Depends on what kind of scale you are talking about. A scale that compares weight to another kind of force, like a spring force, will not measure mass directly. The scales that are calibrated in a unit with the same name as a mass unit, divide by an assumed Earth standard value of g. The value of g varies by +/-0.3% by location, so if you need 3 significant figures in your answer, you need to account for gravity's local value specifically instead of the global average.
However, if you use a balance instead of a scale, comparing weight to the weight of a reference object, you will measure your mass more directly. The gravity "cancels out of the equation", and you get the same read-out, no matter what gravitational field is present, as long as there is one.
@@carultch sorry uh.. this comment was a year back when I was still in school(in an undergrad course now). I was referring to scales like the balancing ones.
pound (lb) is a mass unit...
Sadly, in English units, there are two terms "pound-force" and "pound-mass" which, for obvious reasons, often get confused. When physicists refer to "pounds" we are referring to "pound-force", because 1 pound refers to the force of gravity exerted on 1 slug of mass here on planet Earth. hyperphysics.phy-astr.gsu.edu/hbase/mechanics/slug.html
Ok, anyway you give excellent physics explanations
Like it!
Just a request sir could you not just throw books, in India here we respect books a lot and seeing the this just doesn't feel good well not hate just a humble request
Thanks for letting me know. I will keep this in mind for the future.
mass and weight are the same