Acceleration is measured by using an accelerometer, an electromechanical device that measures acceleration forces. Dimension Engineering explains that these forces can be static, such as those caused by gravity, or dynamic, as in those that cause motion.Know More
Accelerometers can work in a variety of ways, but the two main types work through piezoelectricity, or capacitance. Piezoelectric material generates an electrical charge when a pressure is applied to it. When a vibration or change in motion (acceleration) occurs, a mass in the accelerometer will apply a pressure to the piezoelectric material proportional to the acceleration; thus, the piezoelectric material will generate an electric charge proportional to the acceleration. Since accelerometers are typically calibrated, the measured output charge can easily be corresponded to an acceleration.
Another way accelerometers can work is through capacitance. According to Wikipedia, capacitance occurs when two conducting materials are separated by a non-conducting material, like air, and the distance between them determines the amount of capacitance that is available. If the two conducting materials move apart due to acceleration, then the capacitance between them changes. By introducing circuitry, it is possible to convert from capacitance to a measurable voltage, which corresponds to an acceleration as with a piezoelectric accelerometer.Learn more about Motion & Mechanics
There are three types of acceleration in general: absolute acceleration, negative acceleration and acceleration due to change in direction. Acceleration is defined as the rate of change of velocity.Full Answer >
Rotational equilibrium occurs when an object is either not rotating and remains at rest or is rotating at a constant rate – all torques acting on an object have a net value of zero, and there's no rotational acceleration. This occurs due to the rotational analogue to Newton's first law: an object at rest or in motion continues in the same state unless acted on by an unbalanced torque.Full Answer >
A change in velocity is called acceleration. It can be positive or negative, though negative acceleration, or a decrease in velocity, is often referred to as deceleration.Full Answer >
Rate of deceleration is expressed as negative acceleration. The negative sign indicates that deceleration takes place in the opposite direction as acceleration. Both are as expressed in standard units m/s^2.Full Answer >