2011 GCE O Level Combined Science (P2 Physics) Suggested Solutions

單﹍♂ · 发表于 2-11-2011 21:04:34|来自：新加坡

For qn5, the person weight 400N, when release the person, the string experience 500N, the line we draw shouldn't be longer than 7cm?

pika93 · 发表于 2-11-2011 23:52:11|来自：新加坡

12d) gravitational potential energy can??

Anu · 发表于 5-11-2011 16:53:58|来自：新加坡

Question 5.My answer was 857N because i multiple 12 cm with (500/7)....is it possible to get marks for it??

冷风1985 · 发表于 6-11-2011 10:23:11|来自：新加坡

tianya1 发表于 2-11-2011 19:10
12 a
the force exerts by foot should be greater than the piston since it has a shorter perpendicular ...

No.
The perpendicular distance from the pivot to the force exerted by foot is longer than the other.

冷风1985 · 发表于 6-11-2011 10:24:00|来自：新加坡

kyukyung 发表于 2-11-2011 20:46
same! i also said it will move backwards, away from the lens

Yes, you are correct.

冷风1985 · 发表于 6-11-2011 10:25:55|来自：新加坡

pika93 发表于 2-11-2011 23:52
12d) gravitational potential energy can??

Sorry, your answer cannot be accepted.
The question never mensions the car is moving up a slop.

Anu · 发表于 8-11-2011 11:08:55|来自：新加坡

Question 5.My answer was 857N because i multiple 12 cm with (500 / 7 ).... is it possible to get marks for it??

冷风1985 · 发表于 8-11-2011 21:42:27|来自：新加坡

Anu 发表于 8-11-2011 11:08
Question 5.My answer was 857N because i multiple 12 cm with (500 / 7 ).... is it possible to get mar ...

No worries, that will most probably be accepted, since there is only a difference of 1mm.