Question

Here it is!!
https://s18.postimg.org/prpylg4x5/question_number_1.png

Answer 1

@Shadow

Answer 2

Upload the file using the "Attach File" function below.

Answer 3

for the observer from the earth's point of view should see the light move at speed C - the speed of the airplane?

Answer 4

that's a minus btw

Answer 5

They are both vectors, since they have direction. Plane is going the opposite direction, therefore you must subtract 300 from C.

Answer 6

yeah thats what i thot.

Answer 7

That's if you're on the plane though

Answer 8

wait let me draw a quick diagram of the questioin and see if my pen werks or nahh

Answer 9

Moving classes, give me a couple min

Answer 10

wait.....what? are you telling me that the person standing on the earth should see the light move at speed C opposite to the airplane's direction??? yeah actually that makes sense. sorry im dumb

Answer 11

nope my pen still doesn't work...at least on this site. ....

Answer 12

so from a non-inertial reference frame the speed of light would be C and from and inertial frame of reference the speed of light would be C - the velocity of the plane

Answer 13

Haha, first time I have heard that terminology "non-inertial reference frame" and "interial frame of reference." How would you describe those?

Answer 14

jesus....really? :O

Answer 15

inertial frame of reference is if an object is moving with respect to what you are trying to make your calculations with....

Answer 16

for example in this scenario.... the inertial frame of reference would be the person turning on the flash light while being on the airplane

Answer 17

Person on the ground, non inertial?

Answer 18

and the non-inertial frame reference is the earth...or the person standing on the surface looking at the light passing by at speed C

Answer 19

yeah

Answer 20

this is why earth is considered a non-inertial frame of reference....because anything that is on the surface is considered stationary

Answer 21

Mhm, I get it.

Answer 22

sorry its the other way around.... inertial frame of reference is stationary and the non-inertial frame reference is moving

Answer 23

when i say stationary...i mean either moving at a constant speed or completely at rest. and non-inertial frame of uhgggg....is acceleration with respect to the inertial frame of blahblah blah

Answer 24

Inertial frame = no acceleration in respect to observed project
Non-inertial = accelerating in respect to observed object

It makes sense. If I run at the same speed that a bird flies it, I would think we were both stationary without the background to compare it against (our eyes use relative velocity to determine if something is moving).

Answer 25

so what do you suggest bout the question.>?????!?!!

Answer 26

Which one, a or b

Answer 27

a

Answer 28

From Earth's frame of reference:
The light would travel at C - 300
The ball would travel at 20 - 300

Answer 29

wait.... let my brain process that...1 sec

Answer 30

what about.....the non-inertial frame of reference.....the person who threw the ball and shined the light?

Answer 31

how would be perceive the two things from his point of perspective.

Answer 32

Same way if he did it on Earth.

Answer 33

really? wait....processes info*

Answer 34

yeah it kinda make sense

Answer 35

I mean, you have been on an airplane before, right?

Answer 36

yeah

Answer 37

Hai Parrot!

Answer 38

hello swan. not here plz. getting help :) if u dont mind. :)

Answer 39

Lets say plane is moving East towards Europe
East = pos
West = neg

I am on the plane. I throw something towards the West at 20m/s. It looks to me like it goes 20m/s. Though I shouldn't be throwing things at 20m/s on an airplane. Yet the airplane is going at 300m/s. From Earth's perspective, that thing would travel at neither 300m/s, nor 20ms, but 280m/s

Answer 40

processes*

Answer 41

yeah your answer is correct but the ball isn't literally travelling at 280m/s west.... 280 would be the net velocity of the ball east.

Answer 42

oh btw one more queston.....

Answer 43

From Earth's perspective.

Answer 44

It isn't actually going at that speed.

Answer 45

yeah from earth's perspective...

Answer 46

But again, it's all relative xD

Answer 47

yeah depends how you look at it.

Answer 48

anyway one more quick question....u can answer it here..nothing major

Answer 49

so let's assume that the plane is travelling at 0.40C of speed of light. It flies around the world for a year. There's another clock on the earth measuring the time it left. my questioin is after 1 year. will the clock on the plane ever merg with the clock on the earth...???assuming you bring the clock back to earth

Answer 50

Is this a HW question or curiosity question?

Answer 51

it's actually an assignment queston...but i want your remarks...on it tho

Answer 52

i think the clocks dont ever sync but i could be wrong

Answer 53

Well, what's your reasoning for them not syncing?

Answer 54

take the example of two human beings....one goes to the space on a space trip at half the speed while the other one stays on earth....after a year, when big brother returns to earth he sees his brother aged more than him ....in that sense their age has been permanently shifted...

Answer 55

But a year has passed for both of them. How did the brother in space age more?

Answer 56

the brother in space aged much less than the brother on earth

Answer 57

Okay, vice versa then. How did that happen?

Answer 58

cuz they both experience time at difference pace

Answer 59

as you travel closer and closer to the speed of light, time tends to slow down for you, while the person who experience time at speed time will experince no change in time

Answer 60

time is considered a 4 dimension

Answer 61

estially as u travel closer to the speed of light, the light is going to take more time to reach you...thus you experience less time and thus feel less aged

Answer 62

again you're making measurement from a non-inertial frame of reference

Answer 63

assumeing you are travelling at half the speed

Answer 64

@sillybilly123 may we have some assistance

Answer 65

here's a quick example for you....if i were to tell you to take sprint to the edge of the solar system and come back at 0.99C of light while your older brother stays on earth.....the time it takes you to get to the edge of the solar system and come back will be half the time that your brother experiences on earth...because it takes time to cover distance and since you are travelling away from the light source....for half of the trip, you will expereince your past present and future in one moment/at once while your getting to the edge of the solar system...remember you're travelling at speed C. However when u r heading back to earth, the light reaches you at C as you are travelling at C. so that is the only normal time you'll ever experience in this journey... your brother on earth will experience time as normal

Answer 66

@Shadow

Answer 67

i have to go now :/ sad bye :* thanks for the help tho...ily :* <3

Answer 68

Lol, I was here, was just experiencing a bug that I had put upon myself (The 3 Tab Bug on Chrome).

Answer 69

Note: Never a good idea to open 3 tabs of QC at the same time on chrome x'D

Answer 70

I'd say the answer is yes, IF "It flies around the world for a year" is from the plane's point of reference, and because it is travelling "faster" than the earth (Speed of Plane+Earth>Earth) 0.40C is very fast and that sort of "slows down" the plane's clock speed, but the earth clock is fine because it's speed isn't changed so, by the time the plane has passed it's one year, the earth time is definitely more than a year. So the plane's clock will meet the earth's clock except both calendars are different

Answer 71

Voca

this is pure trolling.