(4) Calculate how far the spring compresses in the second run. For credit, start with WNC.net E-E, and show work as in #2. Check: should the spring be compressed more or less than before? DO NOT POST DO NOT ASSIST
(5) MVQ Next, you're going to calculate your friend's speed at the instant before she hits the spring. Choose the interval you're going to analyze, then describe it here in one sentence: when does the interval begin and end? The choice is entirely up to you, but of course the interval must either begin or end at some instant t before she hits the spring.
(6) Starting from either E, - E, or WNC.net - Ef-E₁, calculate your friend's speed just before she hits the spring. Show all steps. DO NOT ASSIST depending on the interval you described, calculate your speed. DO NOT POST DO NOT ASSIST