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What does a train have that the same job as an accelerator?

A train has a throttle that does the same job as an accelerator.

* Accelerator: In a car, the accelerator controls the engine speed, which in turn controls the car's speed.

* Throttle: In a train, the throttle controls the power output of the locomotive, which determines the train's speed.

Both the accelerator and throttle increase the power output of the engine to make the vehicle move faster.