1. The problem statement, all variables and given/known data A 91-kg astronaut floats outside a 3,131 kg spacecraft. She's initially stationary with respect to the spacecraft. Then she pushes against the spacecraft, and moves away at 0.195 m/s to the left. Find the SPEED of the recoiling spacecraft. 2. Relevant equations Force = Mass*Acc Kinematics; Xf=Xi+Vit+(at^2/2) Vf=Vi+at Vf^2=Vi^2+2a(Xf-Xi) 3. The attempt at a solution Used f=ma to calculate force of astronaut (-17.745). Used that number with Newtons 3rd law as force for space ship (17.745) and with f=ma found acceleration to be 0.00566 That is as far as I got!