Here are the measurements I used, starting with the longest pendulum and moving toward the shortest: 230mm, 211mm, 196mm, 183mm, 170mm, 159mm, 149mm, 140mm, 131mm, 124mm, 117mm, 110mm, 105mm, 99mm ...

The 1 kg pendulum is held up to the demonstrator's face and released. Because of conservation of energy, the ball will not swing higher than the height at which it was released (in fact, because ...

[Nicholas Rehm] works during the day at the Applied Physics Laboratory ... This is a classic control theory problem, where you need to measure the angle of the pendulum with respect to the ...