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Keppler’s first law
Planets orbit the sun in a n ellipse with the sun at the focus
Keppler’s second law
Planets move faster closer to the sun. A line joining a planet to the sun sweeps out equal areas in the same time.
Keppler’s third law
For a circle, R³ is proportional to T². For an ellipse, R is the semi major maxis.
Gravitational potential
Work don per unit mass in bringing a mass from infinitiy to a point.
Kinetic energy
-GMm/2r = -EP/2
Total energy
-GMm/2r = -EK
What happens to height and velocity when there is viscous drag?
Height decreases, velocity increases
Why oil drops?
They don’t evaporate
electric potential
work done per unit charge to move a small test charge from a point of zero potential to a specific point
