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Why you use the gears in vehicle?

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Anonymous

12y ago
Updated: 8/20/2019

Petrol engines produce their top horsepower (rate of energy output) and torque (the twisting force of the engine converted to pushing force where the wheels touch the road) at fairly high RPM (revolutions per second).

The different gears change the ratios between the number of times the engine revolves per second and the number of times the wheels turn per second.

Using "low gear" when the vehicle is moving slowly or pushing up a steep incline keeps the engine spinning quickly even though the wheels are rotating more slowly. This provides the extra "push" required to accelerate the vehicle or get it up the hill.

Once the vehicle is going along quickly, less energy is required to keep it moving. Using "high gear" when the vehicle is moving quickly enables the engine to spin less quickly (saving fuel) even though the wheels are spinning faster.

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Wiki User

12y ago

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