<span>Finite angular displacements are not vector quantities, the reason being that they do not obey the law of vector addition. This law asserts that the order in which vectors are added does not affect their sum.
However finite angles under addition tend towards commutivity as the angles become very small. Infinitesimal angles do commute under addition, making it possible to treat them as vectors.</span>
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Answer:
Explanation:
Given
Two springs with spring constant
and 
(a)If they are stretched using the same force
Force 
where
and
are the extension in the spring
so 
therefore 
Work done is given by



thus 
(b)If they are stretched the same distance

Thus 
For same extension, work done by Force 1 is more
When frequency increases, the wavelength halves.