posted by ryan .
A rubber band has a"spring constant" of 45 N/m. When the rubber band is pulled by a force of 9.8 N , how far will it stretch and what is potential energy?
Stretch X = F/k = 9.8/45 = 0.218 m
P.E. = (1/2)k X^2 = ___ J
k is the spring constant