Qualification > Sciences
IGCSE PHYSICS DOUBTS HERE !!!!
elemis:
--- Quote from: Relina on May 05, 2011, 05:37:31 pm ---paper 3
here http://www.xtremepapers.me/CIE/Cambridge%20IGCSE/0625%20-%20Physics/0625_w07_qp_3.pdf
--- End quote ---
Terminal velocity is when the object falls at a constant velocity... Can you infer at what time it begins falling at constant velocity ?
The ball is accelerating as long as the graph has a positive gradient, though, the magnitude of the acceleration reduces with time.
Area under the graph whilst at constant velocity (see first point).
Area under the WHOLE graph.
~ Miss Relina ~:
--- Quote from: Ari Ben Canaan on May 05, 2011, 05:46:08 pm ---Terminal velocity is when the object falls at a constant velocity... Can you infer at what time it begins falling at constant velocity ?
The ball is accelerating as long as the graph has a positive gradient, though, the magnitude of the acceleration reduces with time.
Area under the graph whilst at constant velocity (see first point).
Area under the WHOLE graph.
--- End quote ---
a(i) i wrote 4.5/5/6 but answer was different so i didnot knoww why???
elemis:
--- Quote from: Relina on May 05, 2011, 05:50:24 pm ---a(i) i wrote 4.5/5/6 but answer was different so i didnot knoww why???
--- End quote ---
It has to be a range.
4.2 to 6 seconds.
~ Miss Relina ~:
--- Quote from: Ari Ben Canaan on May 05, 2011, 06:59:33 pm ---It has to be a range.
--- End quote ---
unfortunately its not :(
here is the mark scheme have a look
http://www.xtremepapers.me/CIE/Cambridge%20IGCSE/0625%20-%20Physics/0625_w07_ms_3.pdf
elemis:
--- Quote from: Relina on May 05, 2011, 07:02:14 pm ---unfortunately its not :(
here is the mark scheme have a look
http://www.xtremepapers.me/CIE/Cambridge%20IGCSE/0625%20-%20Physics/0625_w07_ms_3.pdf
--- End quote ---
What are you talking about ?
The mark scheme says :
--- Quote ---ALLOW 4.2 – 6s
--- End quote ---
EDIT : Look carefully at the graph. It becomes PERFECTLY horizontal at exactly 4.2s.
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version