Question

energy
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a rubber band is being stretched. before its released, it has 3 units of elastic potential energy. what is the total energy?
0 units
5 units
1 units
3 units

Explanation:

Step1: Analyze Energy Forms

Before release, the rubber band has elastic potential energy ($E_p$) and kinetic energy ($E_k$). At rest (before release), kinetic energy $E_k = 0$ (since it's not moving). The elastic potential energy $E_p = 3$ units.

Step2: Calculate Total Energy

Total energy $E_{total}=E_p + E_k$. Substituting $E_p = 3$ and $E_k = 0$, we get $E_{total}=3 + 0 = 3$ units.

Answer:

D. 3 units