>>7416873Force of flies downward = 0.5kg x 9.8 m/s^2
Force of jar on scale = 1.0kg x 9.8m/s^2
Mass on scale total = 1.0kg + 0.5kg
Total on scale should read 1.5kg due to downward force enabling flight of the flies. HOWEVER the weight may be less than 1.5kg if some flies are lowering in height or OVER 1.5kg if the total of the flies are averaging increasing in height. Realistically is +/- 1.5kg with the unlikelihood of being exactly 1.5kg.
