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Astronauts in orbit are apparently weightless. This means that a clever method of measuring the mass
of astronauts is needed to monitor their mass gains or losses, and adjust their diet. One way to do this
is to exert a known force on an astronaut and measure the acceleration produced. Suppose a net
external force of 50.0 N is exerted, and an astronaut's acceleration is measured to be 0.893 m/s². (a)
Calculate her mass.

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