What is the SI unit of force?

• A. Pound
• B. Newton
• C. Joule
• D. Pascal

Answer: (B)

The SI unit of force is the Newton, which is defined as the amount of force required to accelerate a one-kilogram mass by one meter per second squared. This unit is named after Sir Isaac Newton, who formulated the laws of motion that describe the relationship between motion and force.

In the International System of Units (SI), the Newton is the standard measure used to express force in scientific contexts, making it essential for calculations and applications in physics and engineering. Other options like the pound is a unit of force in the imperial system, while the Joule measures energy and the Pascal measures pressure, which are distinct from force. Understanding the Newton as the SI unit for force is crucial in fields related to mechanics, engineering, and physics, as it provides a consistent basis for comparing and calculating forces.