Which component is specifically used to store energy in a drive system?

The flywheel is specifically designed to store energy in a drive system due to its ability to maintain kinetic energy. It works by rotating at high speeds, which allows it to store energy in the form of rotational motion. As the load on the system changes, the flywheel can release or absorb this energy, helping to smooth out fluctuations in power demand and providing a more stable output.

Engaging with other components demonstrates their functions in a drive system: the gearbox primarily serves to adjust torque and speed between the motor and the driven load, serving a very different purpose from energy storage. The motor converts electrical energy into mechanical energy but doesn’t store energy for future use on its own. Similarly, the pulley is a mechanical component used for changing the direction of force or to transfer power but does not store energy like a flywheel does.

Thus, in the context of energy storage within a drive system, the flywheel is the correct choice.