Ans
1
->
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.
11 years ago
by
harshvardhan shukla
Ans
2
->
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 ..
10 years ago
by
shreya sood