Two exercise cords In order to increase resistance, you put two exercise cords toget...

Two exercise cords In order to increase resistance, you put two exercise cords together as shown in Figure P19.4. What is the effective spring constant of the two bands compared to one? Use data from Problem 3. Explain.

Problem 3 -Exercise stretch cord You want to determine the spring constant of an exercise stretch cord. You pull the cord with a force probe that exerts a 50-N force on the cord, causing it to stretch 20 cm. (a) What is the spring constant of the cord? Describe your reasoning and assumptions. (b) How can you test your answer?