Lab Report                                              ...

---

Lab Report                                                    Name: ____________________                                                                                       Section: ___________________   EXPERIMENT: Hooke’s Law   DATA TABLE 1:  Spring 1     NOTE: Accumulated elongation is the total distance from the reference point, not the sum of increments.    Force (N) Accumulated  (cm) Elongation (stretch) Accumulated (m) Elongation (stretch) Elastic PE (Joules) Data Point 1         Data Point 2         Data Point 3         Data Point 4         Data Point 5         Data Point 6         Data Point 7         Data Point 8         Data Point 9         Data Point 10           DATA TABLE 2:  Spring 2     NOTE: Accumulated elongation is the total distance from the reference point, not the sum of increments.    Force (N) Accumulated  (cm) Elongation (stretch) Accumulated (m) Elongation (stretch) Elastic PE (Joules) Data Point 1         Data Point 2         Data Point 3         Data Point 4         Data Point 5         Data Point 6         Data Point 7         Data Point 8         Data Point 9         Data Point 10             DATA TABLE 3:  Rubber band     NOTE: Accumulated elongation is the total distance from the reference point, not the sum of increments.    Force (N) Accumulated  (cm) Elongation (stretch) Accumulated (m) Elongation (stretch) Elastic PE (Joules) Data Point 1         Data Point 2         Data Point 3         Data Point 4         Data Point 5         Data Point 6         Data Point 7         Data Point 8         Data Point 9         Data Point 10             Questions:   A.    How does the relative stiffness of a spring relate to its spring constant?   B.     How does PE change relative to the stretch of the spring?   C.     Indicate on your graph for the rubber band where the linear behavior stops. What does this mean?   D.    Which is stronger in the region where Hooke’s law is obeyed, the spring or the rubber band? Explain.   E.     Explain what happens to the "spring constant" of the rubber band for the non-linear part of your curve.