Final answer:
The expression for force, which is mass (in kg) multiplied by acceleration (in m/s^2), will have units of kg·m/s^2, also known as newtons (N).
Step-by-step explanation:
The expression that will have units of kg·m/s^2 is one that represents force. According to Newton's second law of motion, force (F) is equal to mass (m) multiplied by acceleration (a), which can be written as F = m × a. Therefore, if you have a mass (in kilograms) and an acceleration (in meters per second squared), the resulting calculation will yield a force, which is measured in newtons (N), where 1 newton (N) is equal to 1 kg·m/s^2.