VCE Physics Question Thread!

[jyce]

Does your cheatsheet have to be taped together if its 2 A4 pages?

Well mine was taped and that was okay. I'm not sure if there's any other acceptable ways of attaching the two pages, but they do definitely have to be attached.

[paper-back]

Do we need to know about the Doppler effect for the Sound detailed study?

[Orson]

What are you guys aims? Exam score and SS...

[jyce]

Do we need to know about the Doppler effect for the Sound detailed study?

No.

[odeaa]

Anyone done the 2013 sample exam? Do you reckon its a good indicator or a bit easy?

[jyce]

Anyone done the 2013 sample exam? Do you reckon its a good indicator or a bit easy?

A bit easy, in my opinion.

EDIT: Well, actually, I just looked at it and I wouldn't say it's that easy. After all, all the questions are from past VCAA exams. However, I'd definitely say it's easier than both the 2013 and 2014 VCAA exams.

[Adequace]

Did you guys learn about impulse in Units 1&2 or 3&4? We've pretty much finished the 1&2 course at school but in the 1&2 checkpoints book it has an energy chapter which requires knowledge of impulse for most of the momentum questions.

[Mc47]

Did you guys learn about impulse in Units 1&2 or 3&4? We've pretty much finished the 1&2 course at school but in the 1&2 checkpoints book it has an energy chapter which requires knowledge of impulse for most of the momentum questions.

We learnt it in 1&2

[Adequace]

What are you guys aims? Exam score and SS...

Even though I'm finishing physics next year, I'm aiming for around 45. I'll be happy with anything over 40 though but obviously want to get more than just a bare 40.

[sheeep]

Which grip/slap rule do we use when finding an induced current? I always got confused on when to use which rule

[jyce]

Which grip/slap rule do we use when finding an induced current? I always got confused on when to use which rule

You use the right-hand-grip rule when applying Lenz's law to determine the direction of an induced current. The right-hand-slap rule is used when you are considering magnetic force.

[bedigursimran]

Hey guys. Can you help me with this question? Thanks!!

A 4WD (2,500 kg) is towing a caravan up in an incline of 110. The 4WD and the caravan encounter a constant
frictional force of 1,250 N and 800 N respectively. The driving force of 13,250 N provided by the 4WD is enough to
accelerate the pair at 1.5 m s-2

Calculate the mass of the caravan.

.

[Floatzel98]

Hey guys. Can you help me with this question? Thanks!!

A 4WD (2,500 kg) is towing a caravan up in an incline of 110. The 4WD and the caravan encounter a constant
frictional force of 1,250 N and 800 N respectively. The driving force of 13,250 N provided by the 4WD is enough to
accelerate the pair at 1.5 m s-2

Calculate the mass of the caravan.

.

I don't know what the actual incline angle is supposed to be, because it shouldn't be 110 degrees (unless I just don't understand the question), but I'll try to go through a general method to the question. It probably helps to draw up a diagram and label everything btw.

Firstly set up your equation of motion:

F_(net) = ma = (2500 + m)*1.5

Then pick a direction for positive motion (up the ramp), then:

(2500 + m)*1.5 = 13250 - 1250 - 800 - m_(4WD)gsin(theta) - m_(caravan)gsin(theta)

Just sub in your values for the angle and solve for m that way. Should be correct...

[bedigursimran]

I don't know what the actual incline angle is supposed to be, because it shouldn't be 110 degrees (unless I just don't understand the question), but I'll try to go through a general method to the question. It probably helps to draw up a diagram and label everything btw.

Firstly set up your equation of motion:

F_(net) = ma = (2500 + m)*1.5

Then pick a direction for positive motion (up the ramp), then:

(2500 + m)*1.5 = 13250 - 1250 - 800 - m_(4WD)gsin(theta) - m_(caravan)gsin(theta)

Just sub in your values for the angle and solve for m that way. Should be correct...

The incline is 11 degrees, sorry. And cute floatzel. I'll do it now and see if I get it

[sheeep]

are sig figs necessary in physics?