Question

the mechanical efficiency of your vehicles powertrain determines how well it converts fuel into ______. steam power drag gasoline forward motion

Explanation:

The purpose of a vehicle's powertrain is to transfer power from the engine to the wheels for motion. Mechanical efficiency measures how effectively it converts fuel energy into useful work, which in this case is forward motion. Steam power is not the end - goal of a typical vehicle powertrain's fuel conversion. Drag is a resistance force, not what fuel is converted into. Gasoline is the fuel itself, not what it is converted into.

Answer:

forward motion