Qualification > Sciences
How to prepare for physics paper 1(cie)??????
highly_ambitious:
--- Quote from: Friends on May 18, 2010, 12:19:59 pm ---The Ans is "D".....
As middle spring is removed total extension becomes 1.5x (3x/2)
When load is doubled extension also doubles....
So the ans is 3x which is D... If u dont understand anything in this explaination tell me...
Hope this helps..
--- End quote ---
how come does extension is 1.5x when the middle spring is removed. The extension is which is . plz explain!
Friends:
--- Quote from: highly_ambitious on May 18, 2010, 12:38:44 pm ---how come does extension is 1.5x when the middle spring is removed. The extension is which is . plz explain!
--- End quote ---
I will explain u with a example....
1) Force is directly propostional to extension.. So as force increses the extension also increase...
2) eg: let say the weight W exerts a force of 6N...So each spring pull 2N (6N/3springs)
Now let say we removed the middle spring.. So now each spring (2 springs) has to pull 3N (6N/ 2 springs) which is 1.5 times the original...
As u know force is directly propostional to extension the extension which is "x" with 3 springs becomes 1.5x with 2 springs...
Hope this will solve ur doubt...
sabrina:
@ friends
very interesting theory. i understood it perfectly now, though i never asked this doubt ;D
highly_ambitious:
ny one plz solve m/j 2009 question 18...i think answer should be C but in mark scheme it is D...what's the reason plzz explain.
highly_ambitious:
--- Quote from: Friends on May 18, 2010, 12:01:10 pm ---PYQ's??????
--- End quote ---
Past Year Questions ;D ;D ;D ;D
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