Question

A group of students designed an experiment with a thread and a rubber stopper. The steps of the experiment are listed below.
Tie a rubber stopper to one end of a 20 cm long thread.
Hold the other end of the thread and whirl it in a circle five times.
Allow the thread to wind up on the finger.
Observe that the rubber stopper moves faster as it comes nearer to the finger.
The experiment most likely demonstrates:

Select one:
a. Kepler's first law of planetary motion
b. Kepler's second law of planetary motion
c. Newton's second law of motion
d. Newton's third law of motion