What unit is used to measure force?

• A. Pound (lb)
• B. Joule (J)
• C. Newton (N)
• D. Pascal (Pa)

Answer: (C)

The unit used to measure force is the Newton (N). In the International System of Units (SI), one Newton is defined as the amount of force required to accelerate a one-kilogram mass by one meter per second squared. This clear definition establishes the Newton as the standard unit for force in scientific contexts, particularly in mechanics.

While pounds (lb) are also a unit of force commonly used in the imperial system, they are not the standard in the SI system. Joules (J) measure energy or work, quantifying how much energy is transferred when a force acts over a distance. Pascals (Pa) are used to measure pressure, representing force per unit area. Understanding these distinctions helps clarify why the Newton is the correct answer for measuring force, as it is specifically defined in terms of mass and acceleration, aligning with Newton's second law of motion.