multiple choice (2 Viewers)

[grimreaper]

well either youre not remembering properly or your teacher is wrong Kelvy, 6 is D. B would be true if the vehicle was travelling at a constant speed, not a constant acceleration is is the case here

 

[bevstarrunner]

well either youre not remembering properly or your teacher is wrong, 6 is D. B would be true if the vehicle was travelling at a constant speed, not a constant acceleration is is the case here

it would be A if at constant speed...

 

[Kelvy]

MMm........i dunno then, i'll jus wait for some ruse guy to speak up

 

[Shimtek]

8/sqrt(1-0.6²)

gives B

shit... i made the 0.6^2 magically turn into plain 0.6.......

but isnt it v^2/c^2 which is 0.6c^2\c^2 which is just 0.6

SO ITS 1-0.6 with no ^2

 

[eska]

wat question 6 is c?!!

 

[The Bograt]

I asked the guy first in our year, he said 6 was A, but I told him how I did it, and he said B was right. It is accelerating away UNIFORMLY, so the line is at a straight slant

 

[grimreaper]

it would be A if at constant speed...

No it wouldnt - remember we're viewing this from the vehicles frame of reference, NOT a stationary point

 

[jiegu]

i got 1b 2a 3d 4b 5a 6d 7a 8 c 9a 10a 11d 12c 13a 14b 15b

 

[Shimtek]

No it wouldnt - remember we're viewing this from the vehicles frame of reference, NOT a stationary point

exactly, it shares the motion of the vehicle so in the vehicles frame of reference it definately doesnt move

 

[grimreaper]

but the vehicle isnt an inertial frame of reference

 

[Kelvy]

Well my teacher jus did the paper and he agreed with me and got B for question 6 :S I dunno, its VERY confusing......stupid physics

 

[ramanij]

No it wouldnt - remember we're viewing this from the vehicles frame of reference, NOT a stationary point

so is the answer to 6 b c or d

 

[The Bograt]

Well my teacher jus did the paper and he agreed with me and got B for question 6 :S I dunno, its VERY confusing......stupid physics

Thats reassuring, I really hope it isn't D since I changed my answer from D to B.

 

[Kelvy]

Hey Sharon,

Ok, im not gonna open my big mouth anymore! I put B, and Im stuck with it!

 

[ahvan]

I got B for q6.....

 

[Kelvy]

sorry sorry......my vow only lasted a few seconds. The dux of my year LAURIE (the 4u maths Laurie) got B, as did nearly every tech in my yr so im feeling better......

 

[Cactus]

Well my teacher jus did the paper and he agreed with me and got B for question 6 :S I dunno, its VERY confusing......stupid physics

EDIT: my bad i misread the question

 

[shazzam]

Haha that's ok, but perhaps Laurie could explain why he got B, I am interested to know...

 

[grimreaper]

I'd be very surprised if 6 was B - how could it be in an accelerating frame of reference?

 

[Cactus]

4a

You got your Mo and Mt mixed up, as an object accelerates its mass increases, but your answer was less than the original mass. i got (B)