d) This value should be close to your answer in question 8. How do yours compare? Can you identify ways you could improve your measurements? 10. Move back to Spring 3 and increase to minimum stretchiness (hard). a) Add the 250 g mass and measure the distance stretched. cm b) Calculate the spring constant, k = N/m 0) Using this value for k, calculate a predicted period for the 250 g mass. T 2 sec (1) Also calculate the frequency, f 2 Hz. 11. Use the simulation to test your predictions? Use the stopwatch to time 10 complete oscillations of the 250 g mass on Spring 3 with minimum stretchiness? You may nd that your reaction time affects your ability to measure the period of this combination. 12. Which variable effects the period and frequency of a spring that is in simple harmonic motion, the amount of mass attached or the amplitude of the spring motion