2016 PSLE Discussions (Born in 2004)
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Concerndad:
I think the balloon is possessed.
Q1 Imho..snuggles2009:
Balloon question: my child said kinetic energy makes the balloon move then gravitational pulls it down
Weight/spring question: my child said change to longer spring
The balloon possessed Kinetic Energy to convert into Gravitional Potential Energy. Hence balloon continued to rise even after the balloon was deflated.
Q2. I think it should not be longer spring.
Change the spring into one that has lesser flexibility. So that it can receive a larger elastic spring force of up to 50kg weight limit.
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There is a MCQ on what are properties of old tyres used in racing. May I know the answer?
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Regarding the balloon question about why did the balloon continue to go up even though the balloon deflated, I have seen a similar question in a PSLE paper many years ago. The answer is most likely: The kinetic energy gained by the toy rocket has not been completely converted other forms of energy at point G. The kinetic energy gained by the toy rocket has been completely converted to other forms of energy at point L.Thus, the balloon only fall to the ground at point L.
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I put strong and smooth- tyre qn
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Tr says it is strong n flexible
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Today science paper have more life science or physical questions?
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tan0117:
Today science paper have more life science or physical questions?
More of life science -
reddiechan:
I think the balloon is possessed.
:rotflmao: Good one.
Does anyone even know what the question is? Did the question asked \"why the balloon move in different direction when air is released?\" or \"why the balloon move in opposite direction?\". If so, the question is obviously referring to Newton's 3rd Law, which I didn't know would be tested at the Primary school level. I'm not even sure how to use kinetic energy or gravitational energy to explain that strange movement. -
ChiefKiasu:
It is why did the balloon travel in different directions.That was what i rememberedreddiechan:
I think the balloon is possessed.
:rotflmao: Good one.
Does anyone even know what the question is? Did the question asked \"why the balloon move in different direction when air is released?\" or \"why the balloon move in opposite direction?\". If so, the question is obviously referring to Newton's 3rd Law, which I didn't know would be tested at the Primary school level. I'm not even sure how to use kinetic energy or gravitational energy to explain that strange movement. -
reddiechan:
I think the balloon is possessed.[/quote] :salute: :rotflmao:
Q1 Imho..Concerndad:
[quote=\"snuggles2009\"]Balloon question: my child said kinetic energy makes the balloon move then gravitational pulls it down
Weight/spring question: my child said change to longer spring
The balloon possessed Kinetic Energy to convert into Gravitional Potential Energy. Hence balloon continued to rise even after the balloon was deflated.
Q2. I think it should not be longer spring.
Change the spring into one that has lesser flexibility. So that it can receive a larger elastic spring force of up to 50kg weight limit.
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