Offcial Physics A thread for the G484 Jan Exam (Newtonian World)

Original post by 101101

Are you not familiar with the concept of counting?

Its actually harder than you think. Especially the numbers after 7.

Reply 242

Original post by Better

Agreed! I need to make sure not to be complacement or I will fail Physics. Going to go through All 2011/2010 Papers again now.

Does anyone have any Notes they can share for anything difficult?

I feel like I don't know enough for some reason or like I'm not 100% prepared???

Do the even older papers and do those resource paper/booklets from page 1.

Reply 243

Original post by MasterYi

Do the even older papers and do those resource paper/booklets from page 1.

Resource Paper Booklets? oooh those, yeah I printed all of them out.

It ran my printer out of ink haha its all in one huge folder. I need to go through them.

Thanks mate! Kk I will get off Studentroom and start going through those after I've done 11' 10' Papers Thanks again!

Reply 244

Original post by MasterYi

Do the even older papers and do those resource paper/booklets from page 1.

Oh wow actually I hadn't printed off the Notes just the questions even better!!! Awesome kk I'm feeling a bit less nervous now.

Time to Coffee Up. 6 Hours of Physics ahead of us!

Reply 245

Original post by Better

Oh wow actually I hadn't printed off the Notes just the questions even better!!! Awesome kk I'm feeling a bit less nervous now.

Time to Coffee Up. 6 Hours of Physics ahead of us!

Great. I'm doing those now, second time round. Have fun.

Reply 246

Lewis43

Please can anyone tell me what you would write if you were asked to describe the Boyles law experiment? like what equipment and measurements? thanks! I can't remember the experiment :/

Reply 247

My notes - not sure if I have missed anything.

Spoiler

Original post by Better

AND IF anyone has any notes on Dataloggers or Links on them??? The Book says nothing about Dataloggers but they come up time and time again on different questions

Uses of data loggers- to record data automatically (more accurate). Can be used over long periods of time (so you could have one going for days, you couldn't have a human there for days) over short time intervals (a human can't measure things in 1 second intervals). Also you can quickly plot graphs using them.

(edited 11 years ago)

Reply 248

Original post by kanojyoxx

My notes - not sure if I have missed anything.

Spoiler

Uses of data loggers- to record data automatically (more accurate). Can be used over long periods of time (so you could have one going for days, you couldn't have a human there for days) over short time intervals (a human can't measure things in 1 second intervals). Also you can quickly plot graphs using them.

You just might be the God of Physics. I humbly thank you ! (but no seriously cheers appreciate it, stressing out so much here!)

These are so insane. I'm printing these out!!!!! I will read this before the exam like 5 times.

(edited 11 years ago)

Reply 249

Original post by Better

You just might be the God of Physics. I humbly thank you ! (but no seriously cheers appreciate it, stressing out so much here!)

These are so insane. I'm printing these out!!!!! I will read this before the exam like 5 times.

I hope it helps. (:

Reply 250

Cyclohexane

Original post by kanojyoxx

I hope it helps. (:

Not to nit-pick, but in circular motion you say:

At the top of a vertical circle, cent force = R + W or ma + mg
Then:

You feel weightless at the top because your weight provides the centripetal force?

:confused:

Reply 251

Original post by Cyclohexane

Not to nit-pick, but in circular motion you say:

At the top of a vertical circle, cent force = R + W or ma + mg
Then:

You feel weightless at the top because your weight provides the centripetal force?

:confused:

In an exam, I believe it was the one with a jet-plane going in a vertical circle. It asked why the pilot felt weightless at the top of the vertical circle. That was the answer the mark scheme said.

You need to remember that unless something is pulling you or holding onto you (such as when you are on the London Eye, you have the metal bar holding onto you), there will still be a reaction force. A ball on the end of a string will feel tension from the string at the top.

If you are just moving around with nothing holding onto you, there will be no reaction force, therefore only weight provides the centripetal force.

I've updated my notes to mention the reaction force. Like I said, I might have missed some things out.

Edit: see June 2011

(edited 11 years ago)

Reply 252

Cyclohexane

Original post by kanojyoxx

In an exam, I believe it was the one with a jet-plane going in a vertical circle. It asked why the pilot felt weightless at the top of the vertical circle. That was the answer the mark scheme said.

You need to remember that unless something is pulling you or holding onto you (such as when you are on the London Eye, you have the metal bar holding onto you), there will still be a reaction force.

If you are just moving around with nothing holding onto you, there will be no reaction force, therefore only weight provides the centripetal force.

Understood, thanks! :biggrin:

Reply 253

Original post by Cyclohexane

Understood, thanks! :biggrin:

Do you have any more questions? :smile:

BTW I've updated my post in between you answering me, nothing important I'm just mentioning it incase anyone reads it and sees its different.

Reply 254

Original post by kanojyoxx

Do you have any more questions? :smile:

BTW I've updated my post in between you answering me, nothing important I'm just mentioning it incase anyone reads it and sees its different.

Yeah you explained it how my teacher did. I was so confused about this concept of Weightlessness though. I asked him if I was Weightless when I jumped in the air and he said yes. #MindBlown

If anyone has anymore tips please do tell! I need all the help I can get. I wish Physics would just be over and done with so I could revise C3 and more importantly C4.

Reply 255

Cinglis95

Original post by kanojyoxx

My notes - not sure if I have missed anything.

Spoiler

Uses of data loggers- to record data automatically (more accurate). Can be used over long periods of time (so you could have one going for days, you couldn't have a human there for days) over short time intervals (a human can't measure things in 1 second intervals). Also you can quickly plot graphs using them.

Your stuff on pressure is gold dust. Must remember this!!! THANKS

Reply 256