Would an astronaut really bale able to make it back to the space station by throwing a wrench in the opposite direction if his cable broke and floated away? I heard this question as it relates to Newton's third law. Wouldn't the astronaut need to throw the wrench faster than he is moving before throwing wrench? Would the wrench even be able to give the astronaut enough force to get back to the space station since the astronaut has more mass than the wrench? He would not only have to throw the wrench fast enough to overcome his speed before throwing wrench but he would have to throw it superman fast to allow him to float back to the space station even if the astronaut is moving slow? No other forces would stop him after the wrench exerts a good force on him? How does being in orbit play a role on the situation? Thank you.