
problem
The not-so-simple pendulum 1
See how the motion of the simple pendulum is not-so-simple after
all.

problem
Little little g
See how little g and your weight varies around the world. Did this
variation help Bob Beamon to long-jumping succes in 1968?


problem
Earth orbit
Follow in the steps of Newton and find the path that the earth
follows around the sun.

problem
The not-so-simple pendulum 2
Things are roughened up and friction is now added to the
approximate simple pendulum
