Problem 11.40 Weighing astronauts. In order to study the long-term effects of weightlessness, astronauts in space must be weighed (or at least "massed"). One way in which this is done is to seat them in a chair of known mass attached to a spring of known force constant and measure the period of the oscillations of this system. The 35.6 kg chair alone oscillates with a period of 1.30 s , and the period with the astronaut sitting in the chair is 2.23 s . V PartA Find the force constant of the spring. 9 k: N/m 7 PartB Find the mass of the astronaut. Am a a o ? m: kg m nest Answer Problem 11.28