Which units can be used to express force?

Choosing the Correct Units for Force Measurement

When it comes to expressing force, it is important to use the appropriate units to ensure accuracy and consistency in calculations. In physics, force is a vector quantity that is typically measured in Newtons (N). However, there are other units that may be mistakenly used to express force. Let's explore the different units that can be used to express force and determine the correct choice.

Potential Units for Force

a. N
b. kg/s^2
c. kg • m/s^2
d. two of the above

Final Answer

The correct units to express force are N (Newtons). kg/s^2 and kg • m/s^2 are not valid units for force.

Explanation

The correct units to express force are N (Newtons). Newton is the standard unit of force in the International System of Units (SI). It is defined as the force required to accelerate a mass of one kilogram at a rate of one meter per second squared.

The other unit options mentioned in the question, kg/s^2 and kg • m/s^2, are not valid units of force. kg/s^2 represents a unit for measuring the rate of change of mass, while kg • m/s^2 represents a unit for measuring momentum. These units are not equivalent to force.

Therefore, the correct answer is d. two of the above because N is the correct unit for force.