Elastic PE

This is the stored energy of any stretched or compressed object.

You can find the EPE of an object by taking the object’s stretch (x) and squaring it, then multiplying it by half of the constant that reflects the elasticity of the object. (k)

EPE = 1/2k * x2 (EPE=J, x=m, k=N/m)(J) = N/m * m2

Elastic PE

Elastic PE1. The elastic force constant of a spring in a toy is

550 N/m.  If the spring is compressed 0.12 m, compute the potential energy stored in the spring.

= 3.96J

2. The elastic force constant of a rubber band is 2.76N/m. The rubber band is stretched 0.45 m. Calculate the Elastic Potential energy of the rubber band.

= .28J

3. An elastic force of 125 N/m is used to stretch a spring 0.33 m.  Compute the potential energy stored in the spring.

= 6.81J