name the main resistive force that opposes the driving force when a vehicle is moving.

The main resistive force is air resistance , also called drag.

Quick Scoop

When a vehicle moves, several forces oppose its motion, but the key one usually meant in this type of question is air resistance (drag), which acts in the opposite direction to the vehicle’s motion through the air.

At higher speeds, drag grows rapidly with speed, so it becomes the dominant resistive force compared with others like rolling resistance from the tyres and road.

So, for the exam-style wording “name the main resistive force that opposes the driving force when a vehicle is moving”, the expected one-word answer is:

Drag (or air resistance).

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