A spring is held compressed so that its ...

A spring is held compressed so that its stored energy is `2.4 J`. Its ends are in constant with masses `1 g and 48 g` placed on a friction less table. When the spring in released, the heavier mass will acquire a speed of:

`(2.40)/(149)m//s`

`(24xx49)/(48)m//s`

`(10)/(7)m//s`

`(10^(4))/(7)m//s`

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