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System Interactions and Changes Videos 15 videos

AP Physics 1: 1.1 System Interactions and Changes
196 Views

We wouldn't give away the answer to this AP Physics question, not for all the joules in the crown. Come back when you've got some actual jewels. Th...

AP Physics 1: 1.2 System Interactions and Changes
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AP Physics 1: 1.2 System Interactions and Changes. What is the total mechanical energy of the system?

AP Physics 1: 1.4 System Interactions and Changes
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AP Physics 1: 1.4 System Interactions and Changes. What is the change in linear momentum?

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AP Physics 1: 1.2 System Interactions and Changes 250 Views


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AP Physics 1: 1.2 System Interactions and Changes. What is the total mechanical energy of the system?

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Transcript

00:00

Thank you We sneak and here's your shmoop dooz your

00:05

brought to you by toy cars when we were little

00:07

We used to love playing with toy cars but our

00:10

insurance premiums only just went through the roof Atticus is

00:14

playing with his new hot wheels set He assembles a

00:17

ramp That's two leaders tallinn places a six kilogram car

00:21

at the top of the ramp Six kilograms You kidding

00:23

me Hot wheels with cold way that's very heavy hot

00:27

wheels car way don't write this way The car reaches

00:31

the speed of five meters per second at the instant

00:33

it crosses the halfway point of the ram What is

00:36

the total mechanical energy of the system And hear the

00:40

potential answers like fifteen pound car His cards were ounces

00:46

all right mechanical energy doesn't mean we're excited because we're

00:50

doing the robot like that Although we do have some

00:52

pretty sweet robotic dance moves but separate issue no mechanical

00:56

injury is the sum of potential energy plus kinetic energy

01:00

let's tackle potential energy first potential energy equals mass times

01:03

gravity times height In this scenario the highest two meters

01:07

gravity is always his ten meters per second squared and

01:09

the car has a massive six freaking kilograms That's very

01:13

big waken Plug the numbers into the equation to get

01:16

the potential energy which comes to one hundred twenty jules

01:19

now kinetic energy equals one half of mass times the

01:22

square of velocity Got it all right now are kinetic

01:25

energy here equals one half of six kilograms times the

01:29

square of five meters per second giving us a kinetic

01:33

energy of seventy five jewels on lookout We did the

01:36

math All right Well that does it for the heavy

01:38

lifting Now we just add the two numbers together to

01:41

get the total mechanical energy that seventy five jewels lost

01:45

One hundred twenty Jules gives us a total mechanical energy

01:48

of one hundred ninety five jewels Option d is the

01:51

correct answer As long as we can remember the equations

01:54

the math and physics is pretty easy We like to

01:57

think of the equations like the owner's manual of the

01:59

car before we started road trip We have to know

02:01

how to start the car Justice seats open the gas

02:04

tank You know that kind of stuff Actual equation is

02:07

like the directions for our trip But if we don't

02:09

know how to operate the vehicle We'll never get their

02:11

way Just need to remember that when it comes to

02:13

driving safety first but be a boring way to play

02:17

hot wheels Go back through the roof there that's Really 00:02:20.13 --> [endTime] cool

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