Which instrument is primarily used to measure mechanical energy?

The spring scale is designed to measure mechanical energy, specifically by gauging the force applied to a spring. When an object is hung from the spring scale or when the scale is pulled, the amount of stretch or compression of the spring corresponds to the force being exerted, which can then be used to calculate the mechanical energy involved.

This form of measurement is significant in scientific contexts, particularly in physics experiments where forces and energy transfer are involved. The way a spring scale operates directly aligns with the principles of mechanical energy, as it quantifies the force acting on an object, thus allowing for calculations of potential and kinetic energy.

In contrast, a thermometer measures temperature, a graduated cylinder is used for measuring liquid volume, and a barometer measures atmospheric pressure. Each of these instruments is specialized for a different type of measurement and does not pertain to mechanical energy. By understanding these distinctions, one can appreciate why the spring scale is the appropriate choice for measuring mechanical energy.