What unit is used to measure force in physics?

The correct unit for measuring force in physics is Newtons. This unit is named after Sir Isaac Newton, who contributed significantly to our understanding of motion and force through his laws of motion. According to Newton's second law, force is defined as the product of mass and acceleration, which mathematically can be expressed as ( F = ma ). The unit of mass is kilograms, and the unit of acceleration is meters per second squared, leading to the derivation of the Newton as ( \text{kg} \cdot \text{m/s}^2 ).

Other units mentioned, such as Pascals, Joules, and Watts, refer to different physical quantities. Pascals measure pressure, which is force distributed over an area. Joules represent energy or work done, while Watts indicate power, which is the rate of doing work or transferring energy. Therefore, the definition and application of the unit Newton are specifically tied to force, making it the appropriate answer in this context.