A person brings a mass 2kg from A to B. ...

A person brings a mass `2kg` from `A` to `B`. The increase in kinetic energy of mass is `4J` and work done by the person on the mass is `-10J`. The potential difference between `B` and `A` is ......`J//kg`

`4J//kg`

`7J//kg`

`-3J//kg`

`-7J//kg`

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