When a 1.0kg mass hangs attached to a sp...

When a `1.0kg` mass hangs attached to a spring of length `50 cm,` the spring stretches by `2 cm.` The mass is pulled down until the length of the spring becomes `60 cm.` What is the amount of elastic energy stored in the spring in this condition. if `g = 10 m//s^(2).`

`1.5 jou l e`

`2.0 jou l e`

`2.5 jou l e`

`3.0 jou l e`

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