Purpose: To measure motion in various situations.

Sonic Motion detector

The sonic motion detector is very useful in measuring the motion of objects in real time when a string can not be attached to the object. It is limited in its resolution to a few centimeters which is usually good for most qualitative and many quantitative demonstrations.

Demonstrations used in: M01, M81, M82, M87

Photogates

Photogates can give very accurate measurements of the time that an object takes to pass through the gate.

Demonstrations used in: M24

Rotary Motion Sensor

The rotary motion sensor can measure angular motion to 0.25 degrees. If a string is wrapped around the pulley the distance moved can be resolved to better than 1 millimeter.

Demonstrations used in: M78, M79, M84, M91, F09, H58

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