Well, let's first look at the definition of what physical science is.
"The sciences concerned with the study of inanimate natural objects, including physics, chemistry, astronomy, and related subjects."
Studies in these fields help us to understand the world as a whole. It provides answers and explanations to certain subjects. Like the Force equation in physics. Studies in that field helped us understand the whole aspect of force and how it works. Understanding force will benefit us in construction of buildings, because you'll need to balance out the forces of gravity on each building block so that the structure remains stable.
