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 in Motion & Mechanics
G-force is an attractive force caused by the acceleration due to gravity on one object by another object. Positive g-force increases the apparent weight of a body while negative g-force decreases the apparent weight of a body.Full Answer >
The weight of a toy cart does not affect its acceleration going down a ramp. This counterintuitive fact demonstrates the relationship between gravitational force and mass.Full Answer >
When the acceleration of an object is zero and the velocity is positive, the object continues to move at a steady velocity in the same direction. The object cannot be changing direction because direction change results in non-zero acceleration.Full Answer >
Gravitational potential energy depends on the mass of the object, acceleration because of gravity and the height of the object from a zero position, which is typically the ground or surface where the object is resting. This is because potential energy is the amount of energy stored in an object due to its position and represents the potential for a force, such as gravity, to do work on the object.Full Answer >