A 64.3 kg astronaut is on a space walk when the tether line to the shuttle breaks. The astronaut is able to throw a 10.0 kg oxygen tank in a direction away from the shuttle with a speed of 11.9 m/s, propelling the astronaut back to the shuttle.

Question

Assuming that the astronaut starts from rest, find the final speed of the astronaut after throwing the tank.
Answer in units of m/s.

Answer 1

conservation of momentum
10*11.9+64.3V=0
solve for V.

Answer 2

7.5

Answer 3

1.85*