Eli5: How does changing gears in cars enable them to travel faster compared to using the lower gears at the rpm?

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Me monkey brain tried to do a google search on my own… me monkey brain didn’t understood a thing…me monkey brain need help

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Anonymous 0 Comments

To put it in very simple terms, the same amount of energy can be applied in two different ways– strong or fast. First gear is strong– it overcomes the car’s inertia to accelerate rapidly, but maxes out engine RPMs quickly too. Top gear is fast– it doesn’t have the same power of first gear, but doesn’t have to since it’s just overcoming mostly air resistance and internal friction to stay at cruising speed.

It’s easier to think about with a lever rather than gears and wheels IMO. When you push on the end of a lever, it moves more slowly, but with more torque(rotation strength) on the fulcrum. That’s first gear. Push on the lever closer to the fulcrum and you can move it faster, but your push won’t have the same torque. That’s like a higher gear.

Hope this cleared things up a bit.

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