2019 PSLE Discussions and Strategies (Children born in 2007)

[N.020724rut0]

phtthp\" post_id=\"1938993\" time=\"1569909598\" user_id=\"35251:

N@rut0\" post_id=\"1938986\" time=\"1569909322\" user_id=\"181320:

[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)

Dude the car is still moving at C, as it did not stop or fall down from where it was. So it has KE also

Nonono it will stoppp
:salute:[/quote]Then how does it move on all the way to D? It should have some amount of KE still right? From A to D?

[phtthp]

N@rut0\" post_id=\"1938992\" time=\"1569909505\" 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]It's like if you change the direction of the ball, it will stop before moving but you can't see it, isn't it? ?

[phtthp]

N@rut0\" post_id=\"1938994\" time=\"1569909749\" user_id=\"181320:

phtthp\" post_id=\"1938993\" time=\"1569909598\" user_id=\"35251:

[quote=N@rut0 post_id=1938986 time=1569909322 user_id=181320]
Dude the car is still moving at C, as it did not stop or fall down from where it was. So it has KE also

Nonono it will stoppp
:salute:

Then how does it move on all the way to D? It should have some amount of KE still right? From A to D?
Come to think about it...but it still stops...

[psleisstress]

I think is 45cc cuz air can be compressed

[psleisstress]

I think is 45cc cuz air can be compressed

[whitecarrotcake]

psleisstress\" post_id=\"1939001\" time=\"1569910720\" user_id=\"181338:

I think is 45cc cuz air can be compressed

It can be compressed to 30 cc.

[Mommy of 3]

psleisstress\" post_id=\"1939002\" time=\"1569910733\" user_id=\"181338:

I think is 45cc cuz air can be compressed

My dd also say 45 as cannot be air become lesser and air can be compressed.

[Dino]

whitecarrotcake\" post_id=\"1939004\" time=\"1569911039\" user_id=\"114080:

psleisstress\" post_id=\"1939001\" time=\"1569910720\" user_id=\"181338:

I think is 45cc cuz air can be compressed

It can be compressed to 30 cc.

hmmmm so answer is 45 or 30???

[whitecarrotcake]

30 cc. A similar qn came out before.

Air can be compressed while water cannot. Water will be 15cc+5cc=20cc and since the container has a volume of 50cc, air can be compressed to fit 30cc.

[whitecarrotcake]

Compressed means more air taking up less space. Hence 30 cc is the answer.