A lift in a theatre raises a loudspeaker from the stage floor to a balcony. The balcony is 2.4 m above the stage floor. Raising the loudspeaker transfers 96 J of energy to its gravitational store.
Use gravitational field strength g=10 N/kgg = 10\ \text{N/kg}g=10 N/kg.
Calculate the mass of the loudspeaker.