Giant Pendulum For Classrooms
To demonstrate conservation of energy in a very dramatic way.
Bowling ball pendulum, crane from Machine Shop.
The instructor backs up against the backdrop, holds the pendulum bob up to his or her chin, and releases it.Because of conservation of energy the bob will swing across and return to its original position adjacent to the instructor's chin,but without hitting his or her chin. Despite the wariness of the students, the pendulum bob cannot rise to a height greater than its original height, and the instructor is safe.