it works by reacting to the force created by the mass of your body being in a gravitational field. in short it works by using a force. but that force is because of gravity.
Gravitation is a force, But i believe the answer you want is gravity
By far the easiest method is with the use of a scale. For example, when you stand on a bathroom scale, it displays the magnitude of both forces of gravity between you and the Earth.
Measuring the force of gravity acting on an object involves quantifying the pull that Earth's gravity exerts on the object. This is typically done using a scale or a balance to determine the object's weight, which is a measure of the gravitational force acting on it. Weight is directly proportional to the force of gravity.
Mass is measured accurately and precisely using a balance or scale. A balance compares an object's mass to known masses, while a scale measures an object's weight and converts it to mass using the force of gravity. Both methods ensure accurate and precise measurements of mass.
Earth's gravity exerts a certain amount of attraction (force) on all objects. When you place a scale between that object and the center of Earth's gravity the amount of that force is detected.
The units for weight are typically measured in pounds (lb) or kilograms (kg). Weight is measured using a scale or balance that calculates the force of gravity acting on an object.
Weight is the pull of gravity on a mass, it is measured in a gravity field using a weighing machine (bathroom scales are an example) Mass is an intrinsic property of matter, it is a measure of an object's resistance to acceleration (a change in its state of motion) when a force is applied.
The mutual force of gravitation between the Earth and an object is what we call the "weight" of the object. Note that the force acts both ways. The same force is exerted on the Earth in the direction of the object. The smaller mass is observed to "move" in relation to the larger mass.
Mass is typically measured using a balance or a scale. A balance compares the unknown mass to one or more known masses, while a scale measures the force exerted by the object's mass due to gravity. The unit of measurement for mass is the kilogram (kg) in the International System of Units (SI).
Weight is the force exerted on an object due to gravity. It is typically measured using a scale or balance in units such as pounds or kilograms. Weight can vary depending on the gravitational pull of a given location.
The force of gravity between Earth and an object located on Earth is measured by the object's mass and the distance between the object and the center of the Earth. This force is commonly measured using the formula F = mg, where F is the force of gravity, m is the object's mass, and g is the acceleration due to gravity (9.8 m/s^2 on Earth).
A spring balance is a device wherein an object to be weighed is attached to the end of a helical spring. Gravity is a factor in using this calibrated scale.