A) \[\frac{u\sqrt{3}}{4}\]
B) \[\frac{u}{\sqrt{3}}\]
C) \[\frac{u\sqrt{3}}{2}\]
D) \[\frac{u}{2}\]
Correct Answer: A
Solution :
[a] When the string jerks tight both particles begin to move with velocity components v in the direction AB. Using conservation of momentum in the direction AB, \[mu\text{ }cos\text{ }30{}^\circ =mv+mv\] or \[v=\frac{u\sqrt{3}}{4}\] Hence the velocity of ball A just after the jerk is \[\frac{u\sqrt{3}}{4}\].You need to login to perform this action.
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