physics / Classical Mechanics / free
Lagrangian Mechanics
Find motion by following energy through a system.
energy chooses a pathL = T − V
The generalized coordinate can be an angle, length, or another independent description. This is why Lagrangian mechanics handles constraints cleanly.
kinetic T0.48
potential V0.32
Lagrangian0.16
Move the coordinate and compare the energy terms. The action principle selects a path by making small neighboring path changes cancel to first order.
04 / PRACTICE
0 / 3 checkedMake the idea yours.
Use the model, then answer without looking back. Each check isolates one decision a learner should be able to make after this lesson.
CHECK 1 / 3