New Rotary Motion Sensor at an Affordable Price
Rotary Motion Accessory Kit used with the Rotary Motion Sensor to determine the moment of inertia.
Our new Rotary Motion Sensor lets you monitor angular motion precisely and easily, and it is direction sensitive. You can use it to collect angular displacement, angular velocity, and angular acceleration data. Even though we call it a Rotary Motion Sensor, it can also be used to measure linear position to a fraction of a millimeter.
We also carry two accessory kits. The Rotational Motion Accessory Kit includes the equipment needed to measure moments of inertia, verify the conservation of angular momentum, and conduct investigations of physical pendula.
The Rotary Motion Motor Kit contains a small electric motor that connects to the Rotary Motion Sensor. This allows you to drive the Rotary Motion Sensor and determine the efficiency of a motor when it lifts weights, measure torque produced by the motor, or use the motor as a generator.
Here's a great example of the use of the sensor and the Rotary Motion Accessory Kit to determine the moment of inertia: This photograph shows an aluminum disk from the kit placed horizontally on the Rotary Motion Sensor. A thread is attached to the pulley that holds the aluminum disk. A weight on the end of the thread falls and applies a torque that causes the disk to undergo angular acceleration. Angular position and velocity data are collected as a function of time. (See the Logger Pro graph below.) A linear fit on the angular velocity vs. time graph allows you to determine that angular acceleration, which is used to calculate the moment of inertia.
Logger Pro graph of angular position and velocity data.
- Rotary Motion Sensor | Order Code RMV-BTD | $169
- Rotational Motion Accessory Kit | Order Code AK-RMV | $110
- Rotary Motion Motor Kit | Order Code MK-RMV | $12