Kaplan Nursing Entrance Practice Exam

How is a Newton calculated?

1. f = mv

2. f = ma

3. f = mg

4. f = m/v

The correct answer is: f = ma

The correct understanding of how a Newton is calculated is through the equation that relates force, mass, and acceleration. This relationship is captured in the formula where force (f) is equal to mass (m) multiplied by acceleration (a). A Newton is defined as the amount of force required to accelerate a mass of one kilogram at a rate of one meter per second squared. In this context, force is a vector quantity, which means it has both magnitude and direction, and it is essential to take into account both mass and the acceleration applied to it to determine the force in Newtons. This fundamental principle is a cornerstone of classical mechanics and is universally applied in various fields related to physics and engineering, making the calculation of a Newton clear and relevant. The other options present different equations that relate to physical concepts but do not accurately define how to calculate a Newton. For instance, while the equation involving gravitational force speaks to weight, it does not define force in the broader, more general sense described in the context of Newton's Second Law. The understanding of these relationships allows for the proper application of physical principles in both theoretical and practical scenarios.