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AP Physics 1: 2.5 Fields in Space 209 Views


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Description:

Don't lose your marbles over this AP Physics question. We'll be sure to point you in the right direction. 

Language:
English Language

Transcript

00:00

Thank you We sneak and here's your shmoop douceur brought

00:05

to you by vector fields They're an important part of

00:08

physics but also sound like they could be a cool

00:10

group of superheroes aren't Which of the following is true

00:13

about vector fields right Select two answers and here the

00:16

pension wants president limited All right well vectors can be

00:23

used to describe in calculate anything with magnitude and direction

00:27

on a vector field is a pattern of vectors in

00:30

space patterns determined by the distribution of sources that give

00:34

rise to the field This sounds like a riddle but

00:37

it's not just hang with us We don't mean to

00:39

be totally abstract here So let's try to simplify things

00:41

a bit Imagine a trampling with a bunch of marbles

00:44

sitting on it If the trampoline is left alone the

00:47

marbles won't go anywhere because of inertia They just sit

00:50

there doing nothing like a Now imagine what would happen

00:54

if we put a twenty pound weight in the middle

00:56

of the trampling Well since the trampling would now sag

00:59

toward the middle push down by the way the marbles

01:03

would roll and moved toward the middle due to gravity

01:06

Well the speed and direction of each marble is a

01:08

vector And if we plotted the vectors beach marble we'd

01:11

have the vector field right Looked like that Let's Continue

01:16

our trampling experiment dress Be told we really wanted trampling

01:19

and we might get one if we show it's for

01:21

science using our trampoline Vector field We can see that

01:24

the vectors air going in different directions so we know

01:27

option b is incorrect Now let's Think of how the

01:30

vector field would be different if the weight in the

01:32

middle was fifty pounds Well in that scenario the marvel

01:35

who had moved toward the wait at a faster speed

01:37

because the trampling would sag more And that means that

01:41

the vectors would be different because the magnitude of acceleration

01:44

would be greater So the difference in vectors allows us

01:47

to make a prediction about the source of the vector

01:49

field So one of the correct answers has to be

01:51

option d and if he is correct well then we

01:54

know that sea is incorrect but we're not done yet

01:57

We need two answers Remember now if you had the

02:00

vectors in a vector field together you confined the net

02:03

vector and that's a property of any two or more

02:06

vector So option a is the other correct answer Now

02:10

we've got that problem solved Let's get back to our

02:12

action movie screenplay were vector fields are magnitude is awesome

02:16

and our direction is wherever there's trouble way smell oscar

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