E_{k}=W={\frac {1}{2}}m(v^{2}-{v_{0}}^{2})} 遵守胡克定律的彈簧,若一端固定,拉長後,其彈性勢能(英语:elasticpotentialenergy)為 Δ E p = 1 2 k ( r 2 − r 1 ) 2 {\displaystyle \Delta E_{p}={\frac
Amchitka Island, Alaska: Potential U.S. Department of Energy site responsibilities (DOE/NV-526) (PDF). Department of Energy. December 1998 [2006-10-09]
(PDF)于2009-03-25). Lee, C.; Wei, X.; Kysar, J. W.; Hone, J. Measurement of the Elastic Properties and Intrinsic Strength of Monolayer Graphene. Science. 2008