When load of $5\,kg$ is hung on a wire then extension of $3\,m$ takes place, then work done will be ....... $joule$
When load of $5\,kg$ is hung on a wire then extension of $3\,m$ takes place, then work done will be ....... $joule$
- A
$75$
- B
$60$
- C
$50$
- D
$100$
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- [JEE MAIN 2021]