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Playlist AP® Physics 1: Object Interaction and Forces 13 videos

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AP Physics 1: 1.1 Object Interaction and Forces
258 Views

If there's one good thing about the heat death of the universe, it's that we'll all have an excellent excuse for dodging physics homework.

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AP Physics 1: 1.2 Object Interaction and Forces
213 Views

The real moral of the story here is just "don't get in the way of elephants or tigers." That is not the kind of kinetic energy you want to absorb.

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AP Physics 1: 1.3 Object Interaction and Forces
236 Views

Hi there. We'd like to wave hello to you, but the internet isn't letting us. So instead, accept this fun question about waves and physics! It's alm...

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AP Physics 1: 2.4 Object Interaction and Forces 245 Views


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Description:

AP Physics: Object Interaction and Forces Drill 2, Problem 4. What is the tension of the string as the baskets move?

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Transcript

00:00

All right And here's your shmoop douceur brought to you

00:04

by tensions were talking about tension and physics Not about

00:08

attention Watching your team playing game seven world series like

00:12

have our fingernails seen better days Check the following diagram

00:15

and passage right here you rocks lunch All right Your

00:19

tree house has sweet system for bringing up food without

00:21

making you descend your ladder A string connects two baskets

00:24

over a massless pulley basket A resting ground level in

00:27

basket b is at your front patio Yes You have

00:30

a patio it's that suite when your mom comes by

00:32

and puts luncheon lower basket you add rocks the basket

00:35

b in order to live basket eh With heavier basket

00:38

falls in lighter taste Your basket rises and voila Lunch

00:41

is served Assume that the police frictionless that basket has

00:45

a mass of two kilograms And basket b has a

00:47

total mass of six kilograms Question What is the tension

00:52

of the string as the baskets move All right i'll

00:56

answer All right well just quick Heads up the answer

01:00

this questions you're going to need to have answered the

01:03

previous question first it's okay we'll wait You can't help

01:07

But look for only back then Question three were so

01:09

much younger than so vibrant But if today is just

01:12

a random question work they don't worry about it One

01:14

extra question won't hurt at least All right Now in

01:19

order to calculate the force of tension on the string

01:22

we need to take the product of one of the

01:23

objects mass times gravity and added to the product of

01:26

the objects mass times acceleration So if we use our

01:30

lunches object one equation looks like this All right Because

01:36

we already calculated the acceleration in the last question We

01:38

have all the numbers we need to answer this one

01:40

See your previous question Come in handy now Let's Plug

01:44

in the numbers two kilograms times ten meters per second

01:47

squared plus two kilograms times five meters per second squared

01:51

It gives us thirty newtons Which means the correct answer

01:53

is option deep But just to be sure let's plug

01:56

in the numbers using basket be we might initially think

01:59

that we come up with a different answer because basket

02:01

b has a larger mass But remember basket b is

02:04

moving away from us so it has negative acceleration Numbers

02:09

would look like this 6 kilograms times ten meters per

02:12

second squared plus six kilograms times negative five meters per

02:16

second Squared equals thirty newtons about that what's the same

02:21

No matter which object we use As long as we

02:23

remember to use positive acceleration for an object moving towards

02:26

us and negative acceleration for an object moving away from

02:30

us If we study enough hopefully we can reduce the

02:32

tension felt while waiting for ap physics test results Because

02:36

our fingernails Well they just can't take it anymore I've 00:02:39.61 --> [endTime] been down to the bone

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