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A stone of mass 20 g is projected from a...

A stone of mass 20 g is projected from a rubber catapult of length 0.1 m and area of cross section `10^(-6)m^(2)` stretched by an amount 0.04 m. The velocity of the projected stone is __________ m/s.
(Young's modulus of rubber `=0.5 xx 10^(9) N//m^(2)`)

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