Question

A 10 kg object is lifted up 10 meters. How much potential energy has the object gained?

Answer 1

I found: `980J`

Explanation:

In lifting the object, energy is transferred, through work, inside the system. This work is done against gravity (`"weight"=mg`) through a vertical displacement `h`; so we have that the (Gravitational) Potential energy will be equal exactly to this amount of work, i.e.:

`U=mgh=10*9.8*10=980J`