Astronauts in space cannot weigh themselves by standing on a bathroom scale. Instead, they determine their mass by oscillating 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 wall and releases her. The spring€™s length as a function of time is shown in FIGURE P15.43.

a. What is her mass if the spring constant is 240 N/m?
b. What is her speed when the spring€™s length is 1.2 m?

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L (m) 1.4 1.2 - 1.0 0.8 - 0.6- 0.4- 0.2- t (s) 6. 0.0 FIGURE P15.43 3.