A) 1
B) 3
C) 4
D) 5
Correct Answer: D
Solution :
velocity of first bob at highest point,\[{{v}_{1}}=\sqrt{gR}=\,\sqrt{g{{l}_{1}}}\] (to just complete the vertical circle) Velocity of second bob just after elastic collision = Velocity of second bob at the bottom most point \[=\sqrt{5g{{l}_{2}}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\Rightarrow \,\,\frac{{{l}_{1}}}{{{l}_{2}}}=5\]You need to login to perform this action.
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