2019 PSLE Discussions and Strategies (Children born in 2007)

[AnxiousabtPSLE]

But question 18 requires the energy conversion THE MOMENT it hits the ground…so CANNOT HAVE SOUND ENERGY because it is when the ball is bouncing back up .

[thebusybee]

My son’s from neighbourhood school. He said all papers are easier than his prelims. He practiced other top schools’ prelim papers which are easier, according to him. For prelim science paper 2 qns, many of his classmates incl himself got many 0s for the 1 mark qns.

Next is the killer paper HMT for him! His standard is - MT 75-80%, HMT 50-55% (ever failed) since P2. I just hope he can gain the extra 1 point!

[AnxiousabtPSLE]

So Q18 should be just potential to kinetic

[Nethan Nerella]

quixation\" post_id=\"1938899\" time=\"1569901776\" user_id=\"480:

whitecarrotcake\" post_id=\"1938888\" time=\"1569900796\" user_id=\"114080:

[quote=shutter post_id=1938864 time=1569898013 user_id=5938]anyone knows the ans for MCQ sofa qn?

Friction between sofa and floor

if DD rmember correctly, its not friction. its due to gravity..[/quote]Thats what i put also

[dottypooh]

quixation\" post_id=\"1938899\" time=\"1569901776\" user_id=\"480:

whitecarrotcake\" post_id=\"1938888\" time=\"1569900796\" user_id=\"114080:

[quote=shutter post_id=1938864 time=1569898013 user_id=5938]anyone knows the ans for MCQ sofa qn?

Friction between sofa and floor

if DD rmember correctly, its not friction. its due to gravity..[/quote]My DD also said the same. It's gravity. Cos only changing factor is the added weight. The rest are the same. Friction changes only when there is a change in surface.,ie, rougher or smoother.

[whitecarrotcake]

quixation\" post_id=\"1938899\" time=\"1569901776\" user_id=\"480:

whitecarrotcake\" post_id=\"1938888\" time=\"1569900796\" user_id=\"114080:

[quote=shutter post_id=1938864 time=1569898013 user_id=5938]anyone knows the ans for MCQ sofa qn?

Friction between sofa and floor

if DD rmember correctly, its not friction. its due to gravity..[/quote]Gravity is unless he's lifting the sofa. The qn is pushing sofa, so it's frictional force.

[phtthp]

ihatecompo\" post_id=\"1938896\" time=\"1569901084\" user_id=\"181387:

For me I only found the spring question tricky

any unusual question, came out ?

[dottypooh]

whitecarrotcake\" post_id=\"1938910\" time=\"1569902437\" user_id=\"114080:

quixation\" post_id=\"1938899\" time=\"1569901776\" user_id=\"480:

[quote=whitecarrotcake post_id=1938888 time=1569900796 user_id=114080]

Friction between sofa and floor

if DD rmember correctly, its not friction. its due to gravity..

Gravity is unless he's lifting the sofa. The qn is pushing sofa, so it's frictional force.[/quote]Actually.. what's the exact qn? Hehehe .. my DD nvr tell me in detail cos too eager to go out with friends to celebrate

[Nethan Nerella]

AnxiousabtPSLE\" post_id=\"1938905\" time=\"1569902232\" user_id=\"180550:

But question 18 requires the energy conversion THE MOMENT it hits the ground....so CANNOT HAVE SOUND ENERGY because it is when the ball is bouncing back up .

Exactly!

[whitecarrotcake]

dottypooh\" post_id=\"1938909\" time=\"1569902362\" user_id=\"64091:

quixation\" post_id=\"1938899\" time=\"1569901776\" user_id=\"480:

[quote=whitecarrotcake post_id=1938888 time=1569900796 user_id=114080]

Friction between sofa and floor

if DD rmember correctly, its not friction. its due to gravity..

My DD also said the same. It's gravity. Cos only changing factor is the added weight. The rest are the same. Friction changes only when there is a change in surface.,ie, rougher or smoother.[/quote]Greater mass means more friction between floor and sofa. I think this is one of the trickier qns.