What is the reason when the car starter motor sounds but the engine fails to start?

[Mason]

The reason the car starter motor sounds but the engine fails to start is due to battery issues. 1. Concept: The starter converts the battery's electrical energy into mechanical energy, driving the engine flywheel to rotate and initiate engine startup. Before an engine can operate under its own power, it must first be rotated by an external force. This process involves transitioning the engine from a stationary state to self-sustained operation. 2. Working principle: This involves the energy conversion process based on Ampère's law as taught in middle school physics, where a current-carrying conductor experiences force in a magnetic field. The starter motor consists of essential components including the armature, commutator, magnetic poles, brushes, bearings, and housing.