A toy drone is flown from the ground up onto a balcony.

The drone has a mass of 0.40 kg.
The drone gains 7.84 J of gravitational potential energy as it climbs from the ground to the balcony.
Calculate the height of the balcony.
gravitational field strength = 9.8 N/kg
Use the equation:
ΔEp=m×g×Δh \Delta E_p = m \times g \times \Delta h ΔEp=m×g×Δh