Mass of What was the extension of Object (9) the spring? (cm) 50 grams 100 grams 250 grams Come up with a rule for the length of the spring when a mass is added to it based on the completed chart. Write your rule here: Use your rule to complete the chart below. Mass of Object (9) What was the extension of the spring? (cm) 40 grams 7 cm 12 cm 19 cm 300 grams 500 grams 56 cm 1,000 grams Elaborate: Use the rule you created to find the mass of the mystery objects. Mystery Object Mass (grams) What was the extension of the spring? (cm) Red Object Green Object Gold Object How were you able to calculate the mass of the mystery objects? 38