Objective
To investigate how the centripetal force depends on orbital radius and orbital period.

Principle
We use a conical pendulum in this experiment. The bob
performs a circular motion under the influence of the
tension of the string and the force of gravity. The angle
between these two forces is read on the fly on the
graduated scale on the conical pendulum.
The orbital period can be found with a stopwatch or with
a photogate.