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Two point masses are connected by a ligh...

Two point masses are connected by a light intextensible string are lying on a frictionless surface as shown in figure. An impulse of magnitude `10 kg-m//s` is given to `5 kg` block.

A

Velocity of `10 kg` block immediately after impulse is given `(1)/(3) m//s`

B

Velocity of `10 kg` block immediately after impulse is given `2 m//s`

C

Speed of `5 kg` block immediately after impulse is given `sqrt((28)/(9)) m//s`

D

Speed of `5 kg` block immediately after impulse is given `(sqrt(28))/(9) m//s`

Text Solution

Verified by Experts

The correct Answer is:
A, C
Along the string `10 cos 60^(circ) = (15)v_(x)`
`rArr v_(x) = (1)/(3)m//s` for both `10 kg` and `5 kg`.
In the direction perpendicular to string
`10 sin 60^(circ) = 5v_(y) rArr v_(y) = sqrt(3) m//s`
Velocity of `10 kg = (1)/(3) m//s`,
velocity od `5 kg = sqrt(3+(1)/(9)) = (sqrt(28))/(3)m//s`
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