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Homework Statement
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 .
Homework Equations
Force = Mass*Acc
Kinematics; Xf=Xi+Vit+(at^2/2)
Vf=Vi+at
Vf^2=Vi^2+2a(Xf-Xi)
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 spaceship (17.745) and with f=ma found acceleration to be 0.00566
That is as far as I got!