elastic

elastic - Elastic Potential Energy Any object than can be...

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Elastic Potential Energy Any object than can be deformed (have its shaped changed) and then return to its original shape can store elastic potential energy . We’re still talking about potential energy, since it is stored energy until the object is allowed to bounce back. “Elastic” does not refer to just things like elastic bands…other materials that would be referred to as elastic would be pole vaulter’s pole springs cheese (no, I’m just kidding. Just wanted to see if you’re paying attention) You learned in Physics 20 that Hooke’s Law is… F = k x F = force (N) k = spring constant for that object (N/m) x = amount of expansion or compression (m) We can use this formula to figure out a formula for the energy stored in the spring. Remember that W = F d We might be tempted to just shove the formula for Hooke’s Law into this formula to get W = kxd = kx 2 , but this is wrong! You have to take into account that the force is not constant as the object returns to its original shape… it’s at a maximum when it is deformed the most, and is zero when the object is not

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