Fundamental force
results from an interaction of particles and is independent of the frame of reference
Apparent force
acts on all masses in a non-inertial frame of reference, such as a rotating frame of reference
Examples of fundamental forces
pressure gradient force, gravitational, frictional
Example of apparent force
coriolis force (associated with Earth’s rotation)
pressure
force exerted on a specific area
Pressure gradient force (PGF)
why air moves from high to low pressure
Surface winds
trade winds, westerlies (west to east), easterlies in the equatorial, mid, and polar latitudes, respectively