An astronaut is taking a space walk near the shuttle when her safety tether breaks. What should the astronaut do to get back to the shuttle?

Answer: Take a tool from her tool belt and throw it away from the shuttle.

Next Question:Assuming that the astronaut can throw any tool with the same force, what tool should be thrown to get back to the shuttle as soon as possible?

a. The tool with the smallest mass.
b. The tool with the largest mass.
c. Any tool, since the mass of the tool would make no difference.

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