*SUGGESTED* SOLUTIONS

[Orson]

He's answer is not fine if he simply said that the astronaut has a weight. Yes, the astronaut has a weight but the question asked about whether the astronaut feels as if they have a weight; hence, discussion of the absence of a normal reaction was required.

You mean free fall? Yeah, the dude in the spaceship has no reaction force, thus he is in free fall.

Cheers for doing this!

[dimitrigots]

unsure of the exact questions, but materials and structures detailed study, I think question9, with the hanging mass and the cables, it asked which components were in tension or compression. I remember specifically putting the option with all 3 in tension, casue that was the only option that allowed the forces to cancel out and provide a net force of zero. unsure if that's the answer you've picked. any feedback?

[Davos]

Are these answers ok?
7a) 3.7x10^4 s
7b) 1.1x10^8 m
14b) 9546 V
19a) 91.9 ev and 108.9 ev

[jyce]

Are these answers ok?
7a) 3.7x10^4 s
7b) 1.1x10^8 m
14b) 9546 V
19a) 91.9 ev and 108.9 ev

Yes.

[jyce]

unsure of the exact questions, but materials and structures detailed study, I think question9, with the hanging mass and the cables, it asked which components were in tension or compression. I remember specifically putting the option with all 3 in tension, casue that was the only option that allowed the forces to cancel out and provide a net force of zero. unsure if that's the answer you've picked. any feedback?

Sorry, I didn't do the materials answers myself, so I wouldn't know. Hopefully someone that did materials can let you know.

[ClivePalmer]

Ok so if you do the working out for this question perfectly (in much more detail than depicted below) but swap the 3^2 with 2^2 how many marks do you loose? 3, 2 or 1??
Cheers

[odeaa]

unsure of the exact questions, but materials and structures detailed study, I think question9, with the hanging mass and the cables, it asked which components were in tension or compression. I remember specifically putting the option with all 3 in tension, casue that was the only option that allowed the forces to cancel out and provide a net force of zero. unsure if that's the answer you've picked. any feedback?

the tension forces would pull inwards, so the top would have to be in compression

[ClivePalmer]

I and quite a few other guys came to the conclusion it was compression as the inward force of the tension in the wires compresses the beam.

[dimitrigots]

the tension forces would pull inwards, so the top would have to be in compression

if the tension forces pulled inwards, wouldn't the beam pull outwards to balance these forces though?
oh well, 2 marks gone, not bad, haha

[bobisnotmyname]

What do you guys think about question 16 c with the power loss question. Is it me or do you think 3 marks is way to much for that question?

[dimitrigots]

What do you guys think about question 16 c with the power loss question. Is it me or do you think 3 marks is way to much for that question?

Routine power loss questions, I'm just happy for the 3 easy marks. think I got 16w

[turtleman]

What do you guys reckon the percentage for the exam is for a 40 raw?
 

[jyce]

What do you guys reckon the percentage for the exam is for a 40 raw?

Around 85%.

[Xx_Impulse_xX]

Expected Raw Study Score for getting somewhere between 140 to 142 out of 150?

[doolster]

I just did the paper and I agree with the answers given. 

I taught Structures and Materials and those solutions are right.

Nasty how they change the speed in 4b.    Also big difference between V and v as far as synchrotron formulas go.