**Solution:**

Mass of the object, m = 12 kg,

potential energy, Ep = 480 J.

Ep = mgh

480 J = 12 kg × 10 m s^{–2} × h

h = 480 J / 120 kg m s ^{–2} = 4 m.

The object is at the height of 4 m.

**Solution:**

Mass of the object, m = 12 kg,

potential energy, Ep = 480 J.

Ep = mgh

480 J = 12 kg × 10 m s^{–2} × h

h = 480 J / 120 kg m s ^{–2} = 4 m.

The object is at the height of 4 m.