Step 6 a. Explain why your graph of the period squared vs. the pendulum length should be a straight line. (Tip: the equation for the period of a simple pendulum is = 2 .) b. Use the slope of the trendline to determine a value for the acceleration of gravity. Calculate a percent difference from the accepted value = 9.8 /2. Show all your calculations. Step 8 a. Describe the shape of your graph of period vs. mass. What is the value of the slope of your trendline? b. Do your results make sense? Explain why or why not, and describe what the graph of period vs. mass should look like. (Tip: refer to the equation for the period of the pendulum above.) Step 9 a. Which of the two springs feels stiffer, and which feels stretchier? b. If the same mass is hooked onto the end of both springs, do you think the long spring will have a longer period, a short period, or the same period compared to the short spring? Explain your reasoning. Step 13 a. Explain why your graph of the period squared vs. the mass hooked onto the end of the long spring should