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Fields in Space Videos 15 videos

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...

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. 

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: 2.3 Fields in Space 232 Views


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Description:

AP Physics 1: 2.3 Fields in Space. What is the gravitational force between the two planets?

Language:
English Language

Transcript

00:00

Thank you We sneak and here's Your shmoop too sure

00:05

brought to you by jelly beans and putting strawberry jelly

00:08

on a bowl of pinto beans is just not the

00:10

same You're just gonna have to trust us on this

00:13

one All right planet axe has a mass of thirty

00:18

by ten to the tenth kilograms Planet jelly bean has

00:21

a mass of five times out of planet acts If

00:24

the two masses air separated by a distance of five

00:28

by ten to eighteen meters what is the gravitational force

00:33

between the two planets And hear the potential answers All

00:38

right Well first of all planet jelly bean sounds delicious

00:41

Unless it's licorice flavored in which case it should be

00:43

renamed planet No thanks Before we get to dessert let's

00:47

figure out the gravitational force of these planets Pretty much

00:50

everything in outer space is really big and really far

00:52

apart So the numbers were dealing with in these calculations

00:55

are hard to even imagine Lucky for us physics helps

00:58

us make sense of the universe To calculate the force

01:01

between two objects The formula we use is as follows

01:05

force equals the gravitational constant times the mass of the

01:09

first object times the mass of the second object divided

01:13

by the square of the distance between them It looks

01:16

a little something like this thing Yeah all right A

01:19

quick aside the negative sign in front of the equation

01:22

indicates that the forces moving in words that is if

01:25

the planets were repelling each other the negative sign wouldn't

01:28

be there So now we can just plug the numbers

01:31

into the equation And when we put these numbers in

01:34

our fancy calculator like this we get a fancy solution

01:38

like this The force of gravity equals negative g Times

01:42

one point eight times ten to the negative fourteenth times

01:47

Kilograms per meter squared Cool But that mouthful is our

01:52

answer which in this case is option a If we

01:55

were to use the gravitational constant in the full numerical

01:57

form while then the answer would be in newton's like

02:00

option b But in this case we're not expanding the

02:03

constant so that wouldn't be the correct unit of measurement

02:06

here Oh if there really were a planet jelly beans

02:08

there'd probably be a lot more people interested in space 00:02:10.83 --> [endTime] travel

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