This is a virtual lab experiment.

the question is

Procedure:

Set the length to 0.30 m and the mass to 1.00 kg. Click on the Stopwatch in the lower left corner. Move the object such that the string makes an angle of no more than 10 degrees. Release the object to set it swinging. Use the stopwatch to measure the time for 10 oscillations. One oscillation is the time between the moments that the pendulum is in the same position and moving in the same direction. So if you start your stopwatch when the string is vertical and the object is moving towards the left, then you must stop your stopwatch when the string is again vertical and the object is moving toward the left. Repeat the measurement for a total of 3 trials. Divide by 10 to determine the period of the pendulum. Record, on the data sheet, the data for three trials of the measurement of the period of the pendulum. Be sure to use the correct number of significant figures for each entry!

Repeat the measurements but this time changing the length to 0.50 m. Record the data in the data sheet.

Repeat the measurement again but this time changing the length to 0.70 m. Record the data in the data sheet.

Repeat the period measurements for the different pendulum lengths but using a mass of 1.25 kg. Record the data in the data sheet.

Leaving the length of the pendulum at 0.70 m, and the mass at 1.25 kg, set the pendulum to a larger angle of approximately 20 degrees. Measure the time for 10 oscillations and repeat for a total of 3 trials. Divide by 10 to determine the period of the pendulum. Record the data in the data sheet. Repeat the above measurements for an angle of approximately 40 degrees. Record the data in the data sheet.

So I have done the experiment and recorded the data which is the following:

Object 1 Object 2 Ahass 1 kg 1.25 kg Period of Oscillation 115 Length = 0.30 m 105 115 Small angle (less than 10) 105 105 3 trials 95 Period of Oscillation 135 145 Length = 0.50 m 145 145 Small angle (less than 10) 155 14s 3tab Period of Oscillation 17s 165 Length = 0.70 m 165 175 Small angle (less than 10) 16s 3tah 17s Period of Oscillation 175 Length = 0.70 m Medium angle (about 20) No measurements required 175 3tah 16s Period of Oscillation 185 Length = 0.70 m 185 Large angle (about 40) No measurements required 185 3tah Length (m) Ave rage period (5) Square of the average period (52) 0.30 Object 1:2.95 Object 1:8.41 Object 2:3.25 Object 2:10.24 0.50 Object 1:4.25 Object 1:17.64 Object 2:4.25 Object 2:17.64 0.70 Object 1:4.95 Object 1:24.01 Object 2:55 Object 2:25