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Playlist AP® Physics 1: Fields in Space 14 videos

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AP Physics 1: 1.1 Fields in Space
195 Views

We've heard of some crazy dieting fads, but leaving the planet may take the cake. We don't suggest you do that, but we do suggest you answer t...

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AP Physics 1: 1.2 Fields in Space
212 Views

Don't let this question about gravitational forces get you down! Yeah, yeah...that was an easy joke. You get what you pay for. 

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AP Physics 1: 1.3 Fields in Space
209 Views

THE EARTH'S MASS IS ABOUT TO DOUBLE. Sorry for the extreme tone; we just want to make sure you understand the...gravity of the situation.

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AP Physics 1: 2.4 Fields in Space 239 Views


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Description:

AP Physics 1: 2.4 Fields in Space. Which of the following would help bring the satellite into this new orbit?

Language:
English Language

Transcript

00:00

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

00:05

Brought to you by space junk man The intergalactic police

00:08

should really have stricter laws to help produce alien littering

00:11

Alright Thanks to space junk a satellite has been bumped

00:14

from its previous circular orbit into a new circular orbit

00:18

The technicians on the ground report that the satellite is

00:21

now orbiting at a distance ten percent greater than it

00:23

was previously Which of the following would help bring the

00:26

satellite into its proper orbit And here the potential answers

00:30

rockets to speed it up Slow precinct transporting cargo All

00:36

right so we've got a satellite in orbit and the

00:38

distance of its orbit has changed What we need to

00:41

understand is how the mass and velocity of the satellite

00:44

affect its orbital distance Well the equation used to calculate

00:47

the velocity of an object orbiting the earth is velocity

00:51

squared equals the gravitational constant times mass divided by the

00:56

objects distance from the earth That looks like this harry

00:59

thing right there It's important to remember that the mass

01:02

in this equation isn't the mass of the satellite it's

01:06

the mass of the earth the mass of the satellite

01:08

Doesn't influence this equation so we can eliminate options See

01:12

indeed Taking a look at the equation basic math tells

01:14

us that if the distance increases well velocity decreases We

01:19

can also rearrange the equation to solve for the distance

01:21

And that would look like this We're looking at it

01:24

this way We know that if the velocity increases the

01:27

distance decreases Got it So option a is the correct

01:32

answer Kind of power of the jets and lower the

01:34

satellite back to where it belongs But let's cover our

01:36

bases here We can also think about this question in

01:40

terms of proportions If we have our original equation velocity

01:44

squared equals g times mass divided by distance Then we

01:49

can compare that to the velocity and distance of the

01:53

bump satellite let's Make that equation Velocity b for bunk

01:58

squared equals g times mass divided by distance Be now

02:03

let's Put one over the other to create the proportion

02:07

like that And it'll look a little something like this

02:10

Yeah And you can rearrange that to produce the correct

02:13

velocity Well this means that the original velocity is larger

02:16

than the bump velocity because the bump distance is larger

02:19

Than the original distance as was the case here Sometimes

02:22

there are multiple ways to solve a problem so it's

02:24

important Remember that if we do get stuck on a

02:26

problem to see if there's another approach we can take

02:29

to find an answer Sometimes our brains can lock on

02:31

a one thing and not see that other past Khun

02:33

get us to the promised land Stepping back and taking

02:37

a fresh look helps clear things up And speaking of

02:39

clearing things up well how about holding these littering aliens

02:42

a little more accountable and it's a mess up there

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