Edexcel Physics Unit 1 17th May 2012

I'm so confident with my performance in this exam. * I think I'll get around 70/80, so 115 + UMS.

What I did;

I got 2 ms^-1 for the terminal velocity one.
I said the graph didn't obey Hooke's Law because it wasn't directly proportional, it bent slightly, hence it can't have obeyed it.
I got something like 4.5ms^-1 and 64 degrees for the projectile.

However, one question that did get me was the pebble at the bottom thing...

I said because it had a larger radius, it had a greater viscous drag, hence the resultant force was less. This meant the acceleration was less than that of the sand particles, hence it took longer to reach terminal velocity. As a result, it reached the bottom first.

I thought i was the only person who said it didn't obey Hooke's law, aha :L
and i put pretty much the same thing for the pebble question

We had the horizontal and vertical component of velocity, so we needed to just take the tan inverse of vertical component/horizontal component to get the angle.

Was the hook question of 4 marks?

If it was 4, then 1 mark should probably go for identifying it to brittle, the other to discuss that it doesn't undergoes plastic deformation as it snaps. Though i did wrote a lot for it but i don't remember it.

On the whole the paper was quite easy the jan paper was several times tougher than this, do you agree?

Could you, instead of using SI units, state what each thing was (newton,joule,watt) and then explain how it is that?
For example, would i get marks for saying that a joule is the force when an object of 1 newton moves a distance of 1 meter, and so if the apple, being 1 newton, moves 1 meter, this is 1 joule. And then the same for 1 watt, if the apple moves the 1 meter in the second?

Guys

So for the question about the SI units I explained everything qualitatively rather than qualitatively What do I mean by that? well... I basically said what formula to use to obtain that value so for example when he said it was raised a meter I said, oh... it's GPE because then gave the formula.

How many marks, if any even do you reckon I've lost?

Could you, instead of using SI units, state what each thing was (newton,joule,watt) and then explain how it is that?
For example, would i get marks for saying that a joule is the force when an object of 1 newton moves a distance of 1 meter, and so if the apple, being 1 newton, moves 1 meter, this is 1 joule. And then the same for 1 watt, if the apple moves the 1 meter in the second?

Id reckon you would because by stating that you are showing the examiner that you are aware of the formulas and you have explained it in words. Yeah Id reckon you'd get full marks..

That is probably correct but examiners are critical of the way you explain your answers. Did you use bullet points?

I'm so confident with my performance in this exam. * I think I'll get around 70/80, so 115 + UMS.

What I did;

I got 2 ms^-1 for the terminal velocity one.
I said the graph didn't obey Hooke's Law because it wasn't directly proportional, it bent slightly, hence it can't have obeyed it.
I got something like 4.5ms^-1 and 64 degrees for the projectile.

However, one question that did get me was the pebble at the bottom thing...

I said because it had a larger radius, it had a greater viscous drag, hence the resultant force was less. This meant the acceleration was less than that of the sand particles, hence it took longer to reach terminal velocity. As a result, it reached the bottom first.

Epic! thanks

I did what you did and I stated the formula's and expalined the linke because I had so much time ..how did you guys thought the timing of the paper was?

No, just sentences as they seem to be obsessed with "using correct grammar and punctuation" lmao
is that bad?