# AP Physics 1: 2.4 Fields in Space

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

AP Physics 1 | Fields in Space |

Language | English Language |

Science Practice 3 | Engaging in scientific questioning |

### Transcript

The technicians on the ground report that the satellite is

now orbiting at a distance ten percent greater than it

was previously Which of the following would help bring the

satellite into its proper orbit And here the potential answers

rockets to speed it up Slow precinct transporting cargo All

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

distance of its orbit has changed What we need to

understand is how the mass and velocity of the satellite

affect its orbital distance Well the equation used to calculate

the velocity of an object orbiting the earth is velocity

squared equals the gravitational constant times mass divided by the

objects distance from the earth That looks like this harry

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

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

the mass of the earth the mass of the satellite

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

indeed Taking a look at the equation basic math tells

us that if the distance increases well velocity decreases We

can also rearrange the equation to solve for the distance

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

this way We know that if the velocity increases the

distance decreases Got it So option a is the correct

answer Kind of power of the jets and lower the

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

bases here We can also think about this question in

terms of proportions If we have our original equation velocity

squared equals g times mass divided by distance Then we

can compare that to the velocity and distance of the

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

squared equals g times mass divided by distance Be now

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

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

Yeah And you can rearrange that to produce the correct

velocity Well this means that the original velocity is larger

than the bump velocity because the bump distance is larger

Than the original distance as was the case here Sometimes

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

important Remember that if we do get stuck on a

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

to find an answer Sometimes our brains can lock on

a one thing and not see that other past Khun

get us to the promised land Stepping back and taking

a fresh look helps clear things up And speaking of

clearing things up well how about holding these littering aliens

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