Which expression represents free fall according to the provided material?

• A. mass X v/t
• B. velocity X gravity
• C. mass X gravity
• D. distance X time

Answer: (C)

Free fall is driven by gravity acting on a mass, producing the gravitational force known as weight, which is calculated as the product of mass and gravitational acceleration. In this context, the expression mass × gravity represents that weight, i.e., the pull of gravity on the object during free fall. The other options mix quantities that don’t describe the gravitational force: velocity divided by time isn’t a standard measure of the gravitational pull, velocity multiplied by gravity combines speed with acceleration in an unfamiliar way, and distance multiplied by time is simply a travel-related quantity not tied to the gravitational force.