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--- 183_notes:grav_and_spring_pe [2014/10/15 04:37] – [Spring Potential Energy] pwirving
+++ 183_notes:grav_and_spring_pe [2018/05/29 21:30] – hallstein
@@ Line 1: / Line 1: @@
+Section 6.8 and 7.2 in Matter and Interactions (4th edition)
 ===== Types of Potential Energy =====
@@ Line 33: / Line 35: @@
 [{{ 183_notes:potential_energy.006.png?400|A spring-mass system (spring constant, $k_s$) is stretched through a distance ($\Delta s$).}}]
-To determine the potential energy associated with a spring-mass system, consider the work done by a spring on an object (mass, $m$) attached to its end. The spring is stretched through a displacement ($\Delta \vec{s}$). The displacement and the gravitational force are in opposite directions.
+To determine the potential energy associated with a spring-mass system, consider the work done by a spring on an object (mass, $m$) attached to its end. The spring is stretched through a displacement ($\Delta \vec{s}$). The displacement and the spring force are in opposite directions.
 To calculate the work that the spring does, consider the object as the system. Remember that the [[183_notes:springmotion|spring force changes with displacement]], and thus we must use the [[183_notes:work_by_nc_forces|integral formulation to calculate the work]].