As we've seen, astronauts measure their mass by measuring the period of oscillation when sitting in a chair connected to a spring. The Body Mass Measurement Device on Skylab, a 1970s space station, had a spring constant of 606N/m . The empty chair oscillated with a period of 0.869s .
What is the mass of an astronaut who oscillates with a period of 2.25 when sitting in the chair?