Group+5+Experimental


 * Mythbusters Experimental Design: //Nan & Amy// **


 * TITLE: Edna Mode -Genius designer or con artist? Finding How Stretchy Mrs. Incredible's Suit //Actually// is.**

To determine if Mrs. Incredible's spandex superhero suit is able to reform after being stretched for30 metres in all directions.
 * PURPOSE:**

We believe that Mrs. Incredible’s suit will not be able to reform after being stretched for 30 metres.
 * HYPOTHESIS:**

Assuming that the spandex tights will rip before it reaches the ground, we are going to calculate its extension using Hooke's Law: ** Hooke's Law of elasticity is an approximation that states that the extension of a spring is in direct proportion with the load added to it as long as this load does not exceed the elastic limit. Hooke's law states that where: //x// is the displacement of the end of the spring from its equilibrium position //** k **// is the //force constant// (or //spring constant//)
 * RESEARCH/THEORY:
 * [ F** = -//** k **////x// **]**
 * F** is the restoring force exerted by the material

1) Knot the legs of a pair of spandex leggings to a rail above the foam pit. Let the leggings hang. 2) Measure and record the initial length. 3) Suspend weights on it in increments of 10 with chains and carabiners. 4) Measure and record the length each time weight is added. 4) Add weight until the spandex rips.
 * PROCEDURE:**


 * OBSERVATIONS:**


 * Weight (lbs) || Length of Leggings (cm) || Length Stretched (cm) ||
 * 0 || 64.1 || 0 ||
 * 10 || 77.9 || 13.8 ||
 * 15 || 86.2 || 8.3 ||
 * 25 || 102.3 || 16.1 ||
 * 35 || 112.4 || 10.1 ||
 * 45 || 118.2 || 5.8 ||
 * 55 || 122.0 || 3.8 ||
 * 65 || 141.0 || 19.0 ||
 * 75 || 154.5 || 13.5 ||
 * 85 || Ripped! || Ripped! ||

ANALYSIS:

RESULTS:

The knot securing the leggings to the railing seemed to loosen a bit when we kept adding more weight which affects the length measurements.
 * SOURCES OF ERROR:**