Science Entrance Practice Exam

The SI unit of force is the Newton. This unit is defined in terms of mass, distance, and time based on Newton's second law of motion, which states that the force acting on an object is equal to the mass of that object multiplied by its acceleration (F = ma). In the SI system, one Newton is equivalent to the force required to accelerate a mass of one kilogram at a rate of one meter per second squared.

This definition helps to standardize the measurement of force in scientific contexts, ensuring consistency and clarity in calculations involving motion.

Other options represent units of measurement related to different physical quantities: Joule is the unit of energy, Pascal is the unit of pressure, and Watt is the unit of power. These units are distinct from force and serve specific purposes in their respective areas of physics.