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Virtual Lab - Simple Pendulum

Virtual Lab - Simple Pendulum

A simple pendulum consists of a mass suspended by a (massless un‐stretchable) string. When the mass or bob is pulled to one side and then released it oscillates about the equilibrium position. Provided the angle between the string and the vertical is small (ideally less than 10o) then the pendulum undergoes simple harmonic motion with a period T proportional to the square root of the length of the string and independent of the mass of the bob. This can be written as


where T is the period of the pendulum,
          L is the length of the pendulum (to the centre of the mass)
          g is the acceleration due to gravity

Choose a Length and click button on the Right to Collect Data

   Length = No Mass
   Length = 5 cm
   Length = 10 cm
   Length = 15 cm
   Length = 20 cm
   Length = 25 cm
   Length = 30 cm

Click button to collect data

Data from video - Position vs Time 0 0.10 0.20 0.30 0.40 0.00 0.25 0.50 0.75 1.00 Time (s) Position (cm)

Use the data shown in the table above to determine the Period (T) of the pendulum. Tabulate your data for all of the lengths in the table below, and click plot to plot your data.

Measurment Length (m) Period (s)

Length vs Period 0 0.10 0.20 0.30 0.40 0.00 0.25 0.50 0.75 1.00 Length (cm) Period (s)

Use the gradient from the trend line to determine the value for gravity.