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Two point masses connected by an ideal s...

Two point masses connected by an ideal string are placed on a smooth horizontal surface as shown in the diagram. A sharp impulse of `"10 kg m s"^(-1)` is given to the 5 kg mass at an angle of `60^(@)` to the line joining the masses. The velocity of the 10 kg mass just after the impulse will be

A

`(2)/(3)ms^(-1)`

B

`(1)/(3)ms^(-1)`

C

`2ms^(-1)`

D

zero

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The correct Answer is:
B
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