A) 4
B) 3
C) 2
D) 1
Correct Answer: C
Solution :
[c] : At first collision, particle having speed 2v will rotate by \[240{}^\circ \]\[\left( or\frac{4\pi }{3} \right)\]while other particle having speed v will rotate by \[120{}^\circ \] \[\left( or\frac{2\pi }{3} \right)\]. At first collision, they will exchange their velocities. Now as shown in figure, after two collisions they will again reach at point A.You need to login to perform this action.
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