Please don't give links and give proper reasons of each step in your solution with your suitable figure ( the - Physics - Current Electricity

Question

Please don't give links and give proper reasons of each step in
your solution with your suitable figure ( the correct option of
given question is b)

Decoder_2 · Accepted Answer

Dear studentLet θ is the angle made by the stone at that instant so,mv2L=mg-mgcosθ⇒v2=Lg(1-cosθ)
(1)usng law of ceonservation of energy we have,12mgL=12mv+mgL(1-cosθ)v2⇒v2=gL-2gL(1-cosθ)
(2)solving eqn 1 and 2 we getgL-2gL(1-cosθ)=Lg(1-cosθ)⇒θ=cos-123so, v2=10×151-23=5⇒v=50≈7m/sRegards

Please don't give links and give proper reasons of each step in your solution with your suitable figure ( the correct option of given question is b)