Certified Safety Professional Practice Exam 2025 – Your All-in-One Guide to Exam Success!

In the context of objects in free fall, air resistance is the primary force that acts upon them, especially when those objects are falling through the atmosphere. When an object falls, gravity pulls it downwards, but as it accelerates, it encounters air molecules, which produce a force in the opposite direction known as air resistance or drag. This force increases with the speed of the object and can affect its rate of fall.

While tension force, magnetic force, and normal force are other forces typically encountered in different scenarios, they do not significantly influence an object in free fall within the context specified. Tension force occurs when an object is connected to a rope or string, magnetic force pertains to the attraction or repulsion between magnets, and normal force is the support force exerted upon an object that is in contact with a surface. In free fall, the dominant force acting on the object would be gravity, with air resistance coming into play as a factor that may reduce the net acceleration as it reaches higher speeds.