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A rubber cord has a cross -sectional are...

A rubber cord has a cross -sectional area `1 mm^(2)`and total unstretched length`10.0cm`. It is streched to `12.0 cm` and then released to project a missile of mass 5.0 g.Taking young's modulus Y for rubber as `5.0xx10^(8) N//m^(2)`.Calculate the velocity of projection .

A

`10m//s`

B

`15 m//s`

C

`20m//s`

D

`25m//s`

Text Solution

Verified by Experts

The correct Answer is:
C
`(1)/(2) mv^(2) = (1)/(2) Fe, v = e sqrt((YA)/(ml))`
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