A 90 kg astronaut floating out in space is carrying a 1.0 kg TV camera and a 10 kg battery pack. He's drifting toward his ship but, in order to get back faster, he hurls the camera out into space (away from the space ship) at 15 m/s and then throws the battery at 7 m/s in the same direction. What's the resulting increase in his speed after each throw?____________________m/s speed increase after discarding camera____________________m/s speed increase after discarding battery
His initial momentum is taken as zero. Momentum of thrown camera is 1 kg x 15 m/s 15 kgm/s his mass after that is 90+10 100 kg. He acquires the momentum of the camera, so 15 100ΔV ΔV 15/100 0.15 m/s Momentum of battery is 10x7 70 kgm/s again he gains this momentum, and his mass is now 90 kg 70 90ΔV ΔV 70/90 0.778 m/s
