how come does extension is 1.5x when the middle spring is removed. The extension is which is . plz explain!
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...