How much Energy is Stored?
How much energy can be stored in a spring with k = 490 N/m if the maximum possible stretch is 20 cm?
Known variables:
k=490
x= 20cm or .2m
Kinetic Energy Equation
K.E= 1/2kx2
Once you know your variables and your equation, just plug it in.
K.E= .5 x (490) x (.2)2
K.E= 9.8 J
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