Provide the simple pendulum experiment. Study the motion of a simple pendulum – a pendulum with a small angle of swing (approximately 20 degrees from the vertical).
To answer this question, take into account that the period is the time for one full swing (let go, let it come back to the starting point). Study what happens to the period when you change the weight (keeping the length the same) and change the length of the string (keeping the washers the same). To measure the period more accurately, time ten swings and divide by 10. Discuss sources of error.