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AP Physics 1: 1.1 Properties of Objects and Systems 327 Views


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AP Physics 1: Properties of Objects and Systems Drill 1, Problem 1. Which of the following could be considered as an object in the system?

Language:
English Language

Transcript

00:00

Thank you We sneak and here's your shmoop du jour

00:05

brought to you by systems there's the digestive system the

00:09

immune system the wait what's that well is it the

00:13

ap Physics not biology boy All right a bug is

00:19

sitting on a pencil Ah physics teacher then picks up

00:22

the pencil Which of the following could be considered as

00:25

an object in the system and hear the potential answer

00:29

Is that a bug a pencil physic classroom bug and

00:31

a pencil All right well first of all what do

00:34

we even mean by system Well in physics a system

00:37

is a collection of objects his properties influence the motion

00:40

of things inside the system that might be a little

00:43

confusing So let's think about it in terms of this

00:45

situation we've got the teacher we've got the bug and

00:49

we've got the pencil All of this is happening in

00:52

a classroom However the classroom isn't influencing anything in this

00:57

situation So it's not part of our particular system which

01:00

means we can eliminate option c now the bug crawls

01:03

on the pencil and just sits there It's not trying

01:05

to move the pencil it's not flapping its little bug

01:08

wings to try and lift the pencil up We'll sure

01:10

it added weight to the pencil when it first crawled

01:12

on But now it's just chilling if the teacher was

01:14

using one hand to lift The bug and the other

01:17

lift the pencil Well then we'd have three objects in

01:20

the system Teacher the bug in the pencil But in

01:23

our question when the teacher picks up the pencil with

01:25

the bug sitting on it she's not acting on the

01:27

two things independently she picks both of them up is

01:31

if there were one object which in this system they

01:33

are i think of it as bug insult or pencil

01:37

lug so option d is the correct answer In this

01:41

system we have two objects the teacher and the pencil

01:44

bug combo answers a nd while technically correct just aren't

01:47

complete enough If you're still thrown off consider this let's

01:51

Say you have a brand new baby cousin she's tiny

01:53

weighing in at exactly ten pounds Being a nice older

01:56

cousin you volunteer for feeding duty and give the kiddo

02:00

four ounces of formula after she finishes her lunch You

02:03

wouldn't say you have a ten pound cousin with four

02:06

ounces of food inside of her You have a baby

02:08

that weighs ten pounds four ounces An object in the

02:11

system is the thing that is doing the influencing or

02:14

the thing that is being influenced an object isn't every

02:17

little part that makes up a thing After all pretty

02:19

much everything could be broken down into smaller components You

02:22

know now that we think about it there's a lot

02:24

of physics going on in the body systems too Just 00:02:27.2 --> [endTime] ask the skeletal system

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