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1
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hello rahul.we have learnt in 11th std that the resultant of two vectors a & b is given by r= root over a^2+b^2+2abcos theeta.if a=b then r comes out to be 2acos theeta/2.
9 years ago
by
harshvardhan shukla
Ans
2
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he has simply taken the component of F which is Fcos theeta
due to one and due to both the cos theta component will be added up and so is the restoring force is 2Fcostheeta ..
7 years ago
by
shreya sood