What is her mass if the spring constant is 290 N/m ? Express your answer to two significant figures and include the appropriate units. Astronauts in space cannot weigh themselves by standing on a bathroom scale. Instead, they determine their mass by oscillating m = 66 kg on a large spring. Suppose an astronaut attaches one end of a large spring to her belt and the other end to a hook on the wall of the space capsule. A fellow astronaut then pulls her away from the Submit Previous Answers wall and releases her. The spring's length as a function of time is shown in the figure (Figure 1). Correct Part B Figure What is her speed when the spring's length is 1.3 m ?