Dynamics System
Document No: D0155 (Revision 8)
Pendulum: Using a Rotary Motion sensor for simple pendulum investigations
Use either strong cord or thin wire for the pendulum. Start with a pendulum 0.7 m long. Attach as shown.
Connect the Rotary Motion sensor to an EasySense data logger. The range of the Rotary Motion sensor should be set to Pendulum.
With the pendulum hanging freely, press the reset zero button on the sensor.
Open the EasySense program and select Graph. From the wizard select a suitable duration with an interval of 20 ms e.g. Time
Interval
Trigger
10 seconds
20 ms
Falls below 5 deg
Set the pendulum swinging through an angle of less than 10 degrees either side of vertical.
Select Start to begin logging.
Reduce the length of the pendulum by 0.1 m. Select Overlay and repeat.
Continue until the length of the pendulum is reduced to 0.2 m.
44 Data Harvest Group Ltd.
