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System is shown in the figure. Velocity ...


System is shown in the figure. Velocity of sphere A is 9 `(m)/(s)`. Find the speed of sphere B.

A

`9m//s`

B

`12m//s`

C

`9xx(5)/(4)m//s`

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
B

`9cos alpha=v sin alpha rarr (i)`
`(19-R)/(12)=tan alpha rarr (ii)`
`(R+5)^(2)=(12)^(2)+(19-R)^(2)`
`rArr R=10`
Hence from `(i0` and `(ii)`
`v=12m//s^(2)`
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