A) \[3\sqrt{3}\,mg\]
B) \[\frac{1}{2}\,mg(3\sqrt{3}-2)\]
C) \[\frac{1}{2}\,mg(3\sqrt{3}+2)\]
D) \[\frac{1}{2}\,mg(3-\sqrt{2})\]
Correct Answer: B
Solution :
As shown in the figure in going from position C to B, the bob loses a vertical height ED =h Loss in \[PE=mgl\] \[mgl[(1-\cos \cos {{\theta }_{1}})-(1-\cos \cos {{\theta }_{2}})]\] \[=mgl[coscos{{\theta }_{2}}-coscos{{\theta }_{1}}]\]You need to login to perform this action.
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