What unit of force is defined as the force needed to accelerate a 1 kg mass at 1 m/s²?

What unit of force is defined as the force needed to accelerate a 1 kg mass at 1 m/s²?

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

Answer: (A)

The Newton is the unit of force in the International System of Units (SI) and is defined specifically as the force required to accelerate a mass of 1 kilogram by 1 meter per second squared. This relationship is derived from Newton's second law of motion, which states that the force acting on an object is equal to the mass of the object multiplied by its acceleration (F = ma). In this context, if we have a mass of 1 kg and we want to accelerate it at a rate of 1 m/s², the force applied would indeed be 1 Newton. This definition reinforces the direct relationship between force, mass, and acceleration, making the Newton a fundamental unit for measuring force. Other units of the choices, such as the Pound, Joule, and Watt, represent different physical quantities: Pounds measure force, but in a different system (imperial); Joules measure energy, which relates to work done; and Watts measure power, which is the rate of doing work. Thus, in this scenario, the most accurate and relevant unit of force is the Newton.

The Newton is the unit of force in the International System of Units (SI) and is defined specifically as the force required to accelerate a mass of 1 kilogram by 1 meter per second squared. This relationship is derived from Newton's second law of motion, which states that the force acting on an object is equal to the mass of the object multiplied by its acceleration (F = ma).

In this context, if we have a mass of 1 kg and we want to accelerate it at a rate of 1 m/s², the force applied would indeed be 1 Newton. This definition reinforces the direct relationship between force, mass, and acceleration, making the Newton a fundamental unit for measuring force.

Other units of the choices, such as the Pound, Joule, and Watt, represent different physical quantities: Pounds measure force, but in a different system (imperial); Joules measure energy, which relates to work done; and Watts measure power, which is the rate of doing work. Thus, in this scenario, the most accurate and relevant unit of force is the Newton.