2019 PSLE Discussions and Strategies (Children born in 2007)

[phtthp]

TGP666\" post_id=\"1939058\" time=\"1569917708\" user_id=\"181285:

Is SO FREAGIN HARD

What impact, do 2019 difficult (challenging) Maths & English have, upon the Cut-off-point for Secondary schools, this year ?


This year, (2019) Maths is harder than 2018 Maths

What happened to last year 2018 (COP), for \"mid-tier\" schools ?
2018 (COP) rose unexpectedly by 4 to 5 points, in these mid-tier Secondary schools

So, what will happen to 2019 mid-tier schools, this year ?

drop back, by 4 to 5 points ?

[nerov]

Watch the simulation


http://d3tt741pwxqwm0.cloudfront.net/WGBH/conv16/conv16-int-rollercoaster/index.html

N@rut0\" post_id=\"1938989\" time=\"1569909490\" user_id=\"181320:

phtthp\" post_id=\"1938987\" time=\"1569909336\" user_id=\"35251:

[quote=TGP666 post_id=1938975 time=1569909007 user_id=181285]

Actually i only put gravitational potential energy.(Cause at greatest height all kinetic energy is converted to potential energy)

Anyway at point C the ball will not be moving because you can't see with your eyes but it does stop... So there isn't any kinetic energy.

But how does it still move after that? won't it just fall? [/quote]

[Ellybelly]

nerov\" post_id=\"1939141\" time=\"1569919508\" user_id=\"16273:

Watch the simulation

http://d3tt741pwxqwm0.cloudfront.net/WGBH/conv16/conv16-int-rollercoaster/index.html

N@rut0\" post_id=\"1938989\" time=\"1569909490\" user_id=\"181320:

[quote=phtthp post_id=1938987 time=1569909336 user_id=35251]
Anyway at point C the ball will not be moving because you can't see with your eyes but it does stop... So there isn't any kinetic energy.

But how does it still move after that? won't it just fall?

[/quote]Hi, if based on the simulation video shared by Nerov, wouldn't the main forms of energy be both gpe and ke at the highest point of loop (cos it's at upside down loop?

Thank u.

[Ellybelly]

Hi, I found a link which is clearer and I think it suggests that the rollercoaster has both kinetic n gravitational potential energy at top of loop.


https://www.pinterest.com/pin/238690848975825158/

Hope the link works.

[dylanmummy2003]

TGP666\" post_id=\"1939100\" time=\"1569919395\" user_id=\"181285:

tf is this techniqal glitch

do not keep clicking 'submit' after clicking the submit the first time!
do you realised you have 'flooded' 2 full pages with all duplicated?

do u ever see me having duplicate post? No, cos i only click 'submit' once and let the post run.

[Mangopuff]

Yes, click ONCE will do

[N.020724rut0]

Ellybelly\" post_id=\"1939146\" time=\"1569920122\" user_id=\"179810:

nerov\" post_id=\"1939141\" time=\"1569919508\" user_id=\"16273:

Watch the simulation

http://d3tt741pwxqwm0.cloudfront.net/WGBH/conv16/conv16-int-rollercoaster/index.html

[quote=N@rut0 post_id=1938989 time=1569909490 user_id=181320]
But how does it still move after that? won't it just fall?

Hi, if based on the simulation video shared by Nerov, wouldn't the main forms of energy be both gpe and ke at the highest point of loop (cos it's at upside down loop?

Thank u.[/quote] Thanks for providing a clear explanation to the question! :boogie:

[mengsan]

Do you really think tgp666 really does not know supposed to click once only? U notice how he posted P S L E in 4 very nice posts earlier… imo it’s prank

[whitecarrotcake]

As for the spring qn, from my understanding on how the qn is, there is Spring X hanging from the ceiling and it has a weight attached, then Spring Y is attached to the weight and hanging from Spring Y is another similar weight and then attached to it is Spring Z and followed by another similar weight. Then it’s asked which spring extends the most. Did I get the qn right?

[TGP666]

dylanmummy2003\" post_id=\"1939149\" time=\"1569921339\" user_id=\"116705:

TGP666\" post_id=\"1939100\" time=\"1569919395\" user_id=\"181285:

tf is this techniqal glitch

do not keep clicking 'submit' after clicking the submit the first time!
do you realised you have 'flooded' 2 full pages with all duplicated?

do u ever see me having duplicate post? No, cos i only click 'submit' once and let the post run.

Oh i thought i did not submit the post and clicked 'submit' repeatedly.
Sorry.