VCE Physics Question Thread!

[Orson]

Is it too late now or na

No...you can probably learn something...

[paper-back]

Root Mean Square...

Sorry, I meant; what does RMS voltage/current describe?
Is it the AC equivalent of DC? So DC/(root 2) provides the AC voltage that is equivalent to the DC voltage?

[Orson]

Sorry, I meant; what does RMS voltage/current describe?
Is it the AC equivalent of DC? So DC/(root 2) provides the AC voltage that is equivalent to the DC voltage?

I'm not sure...sorry. I think its ACs voltage respective to DC...not sure...all I know is that you use the RMS when doing equations and finding current, voltage drop and power and stuff, and you only use Vpeak-peak when graphing graphs...

[jumcakes]

Sorry, I meant; what does RMS voltage/current describe?
Is it the AC equivalent of DC? So DC/(root 2) provides the AC voltage that is equivalent to the DC voltage?

If DC voltage is the same as AC(peak)/root (2) = rms of AC, then both the AC and the DC provide the same amounts of power, I believe.

[ClivePalmer]

Hey everyone I was wondering whether if you do a three mark question you do all the working out perfectly in more detail than depicted in this image and simply sub in a 2^2 instead of 3^2 you will loose three marks?

Cheers just wondering how the marking works

[Fusuy]

Hey Guys, was just wondering if someone could give me a study prediction.
Sacs: Rank 1
Exam 147/150

Thanks!

[Davos]

Hey Guys, was just wondering if someone could give me a study prediction.
Sacs: Rank 1
Exam 147/150

Thanks!

I'm no pro at predictions but that is certainly at least a 49, likely 50

[Zealous]

Hey Guys, was just wondering if someone could give me a study prediction.
Sacs: Rank 1
Exam 147/150

Thanks!

Yeah, you'll get yourself another 50 with those exam scores.

[Davos]

Yeah, you'll get yourself another 50 with those exam scores.

Zealous do you know what you got on the Physics exam if I may ask?

[Fusuy]

Sweet! Thanks heaps guys

[dave101]

Hey guys what score do you reckon this would be?

GA1: Low A
GA2: Low A
GA3: 128/150

Rank: 20/65
I did physics 3/4 in year 11 this year
Cheers

[Mc47]

Hey guys what score do you reckon this would be?

GA1: Low A
GA2: Low A
GA3: 128/150

Rank: 20/65
I did physics 3/4 in year 11 this year
Cheers

38-40

[Maz]

Hey guys
just wandering if anyone could answer these questions for me please?
1. Explain the consequences of the total reaction force of a roadway on a car being at an angle to the surface on a horizontal road.When would this occur?
2. At the end of many steep declines there are emergency exit points for trucks that have sand as a base rather than a solid railway. Explain why these are necessary.

Thankyou in advance

[lzxnl]

Hey guys
just wandering if anyone could answer these questions for me please?
1. Explain the consequences of the total reaction force of a roadway on a car being at an angle to the surface on a horizontal road.When would this occur?
2. At the end of many steep declines there are emergency exit points for trucks that have sand as a base rather than a solid railway. Explain why these are necessary.

Thankyou in advance

Well, if the reaction force is at an angle, the reaction can actually contribute to the centripetal force required to make the car go in a circle. This way, you're less likely to have a car skidding out.

As for the emergency exit points, I'd assume it's to quickly slow the wheels down by (rolling) friction as it's not easy for wheels to travel in sand.

[Muchos Help]

For the last question of the attached. How likely will these sort of motion questions be in the VCAA end of year exams? Struggled with this question since I didn't expect it to get this mathsy in VCE physics, ended up getting it by looking at the worked solution though lmao.