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  4. The rubber cord of a catapult has a cross sectional area 1mm2 total unstretchcdlength 10cm. It is stretched to 12cm then released to project a missile of mass 5gm. Taking 'Y' for rubber 5× 108 N/m2, the velocity of projection is

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Q. The rubber cord of a catapult has a cross sectional area $1mm^2$ & total unstretchcdlength 10cm. It is stretched to 12cm & then released to project a missile of mass 5gm. Taking 'Y' for rubber $5\times 10^8\, N/m^2$, the velocity of projection is

Mechanical Properties of Solids

Solution:

$\nu = e \sqrt{\frac{YA}{ml}}$