Definition: The accelerometer is a device that measures changes in acceleration, or the rate at which an object moves. Definition: An accelerometer is a type of sensor that measures the change in velocity of a moving object. It works by converting the change in position of an object into an electrical signal and then analyzing the voltage output from the sensor to measure the speed and direction of motion. An accelerometer typically detects changes in velocity through a small magnet connected to the device, which is called a "field magnet" (or "magnetomotive force"). When an external force such as a weight or air resistance applies an acceleration to the object, the field magnet responds with a change in voltage output. The voltage signal is then converted into an electrical current that can be measured and interpreted by electronic devices. In other words, an accelerometer measures how fast an object moves relative to Earth's center of mass. This information helps engineers design safety devices and sensors for objects in motion.

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