CLASSIFICATION
Compare the following characteristics of
invertebrates and vertebrates.
Overall complexity
General structure
Presence of a backbone
Where they live (in water or on land)
Simple/not complex
More complex
O
More complex body plan, have more complex organ systems
O
Simple body plan, might have a skeleton, simple circulatory or digestive systems
O
Live in water or on land
O
Have a backbone
No backbone

The center of a long frictionless rod is pivoted at the origin, and the rod is forced to rotate in a vertical plane with constant angular velocity \omega. write down the lagrangian for a bead of mass m threaded on the rod, using r as your generalized coordinate, where r, \phi are the polar coordinates of the bead. (notice that \phi is not an independent variable since it is fixed by the rotation of the rod tobe \phi = \omega * t) solve lagrange's equation for r(t). what happens if the bead is initially at rest at the origin? if it is released from any point ro > 0, show that r(t) eventually grows exponentially. explain your results in terms of the centrifugal force m* \omega ^2 *r.