Chesna Chesna 19-07-2022 Physics contestada A sky-diver jumps from a stationary balloon. His initial downwards acceleration is 10m/s². Fig. 1.1 shows the directions of the air resistance and the weight of the sky-diver. The mass of the sky-diver is 60 kg and his weight is 600 N. (a) Explain, using ideas about the forces, why his initial downwards acceleration is 10m/s².