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AP Physics 2: 1.5 Object Interaction and Forces 3 Views


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AP Physics 2: 1.5 Object Interaction and Forces. How does the strong nuclear force work?

Language:
English Language

Transcript

00:04

here's your shmoop du jour brought to you by physics teachers

00:07

our physics teacher likes to say there are no dumb questions to which we say [Physics teacher in a classroom]

00:12

challenge accepted alright a physics student asks her teacher how does the

00:17

strong nuclear force work well how can the teacher respond to this and select

00:22

two answers, here are the options.....

00:27

well the strong force is what holds the nucleus of an atom [Protons and nucleus held together]

00:31

together without it all those positively charged protons would run away from

00:35

each other and the neutrons would well just sit there doing nothing for

00:38

eternity all right put it that way your cousin Ryan might just be a giant [Ryan laying on couch]

00:43

neutron all right but when these particles get close and we mean really

00:47

close like 1 times 10 to the negative 15 meters close the strong force can bind

00:53

them together and this is what allows there to be elements like gold...and

00:57

mercury and oxygen right okay well we're big fans of those elements especially [People basking in the sun on a beach]

01:02

that last one but when these nucleons are farther away from each other

01:05

electromagnetism keeps them away from each other so answer A is incorrect

01:09

right there and answer C is one of our correct choices in order to overcome the

01:15

electromagnetic force and become bound together protons and neutrons have to be

01:20

moving very quickly and we're not talking about race car speeds, physics [Woman wearing a lab coat on a road and race car bursts into flames]

01:24

laughs at how slow race car goes hahaha we mean the kind of speeds found in a

01:29

supernova when a star explodes really really really fast or to put it in

01:34

scientific terms SuperDuper fast so B is the other correct choice right there and

01:39

the strong force got its name for a reason it's the strongest of the four [Strong force flexing biceps]

01:44

fundamental forces gravity is a puny weakling compared to the strong force

01:49

especially in a scale of protons and neutrons so answer D is definitely out

01:53

and remember if you're stumped don't be afraid to ask your physics teacher for

01:57

help..Just make sure it's related to physics we asked our teacher for help

02:00

changing a flat tire once and well it just didn't go over very well [Man with a flat tire and physics teacher laughing]

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