diff --git a/src/pages/sta/virtual_work.astro b/src/pages/sta/virtual_work.astro index 7126b63f..3a464021 100644 --- a/src/pages/sta/virtual_work.astro +++ b/src/pages/sta/virtual_work.astro @@ -29,7 +29,7 @@ import Col from "../../components/Col.astro" -In general, a force does work when it produces a displacement along its line of action. When we talk about virtual work, we're making those displacements infinitesimally small. +

In general, a force does work when it produces a displacement along its line of action. When we talk about virtual work, we're making those displacements infinitesimally small.

@@ -111,8 +111,8 @@ If a body is in equilibrium, the sum of the virtual work done by all the forces Solve. -We can use virtual work to solve for the forces in a system without needing to solve for all of the support reactions. - +

We can use virtual work to solve for the forces in a system without needing to solve for all of the support reactions. +

For example, if a truss is completely pinned on one end, it doesn't move, which means there is no virtual work completed on that pin because there are no virtual displacements ((). This means that we can ignore it in our virtual work equation and don't need to solve for the reaction forces at the truss pin.