What is the speed ratio of an input gear with 36 teeth meshed to a gear with 20 teeth?

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Multiple Choice

What is the speed ratio of an input gear with 36 teeth meshed to a gear with 20 teeth?

Explanation:
In simple gear pairs, speed is inversely related to the number of teeth. The input gear has 36 teeth and drives a 20-tooth gear, so the gear-teeth ratio is 36:20, which simplifies to 9:5. The speed ratio is the inverse of this, giving 5:9. This means for every 5 revolutions of the input, the output makes 9 revolutions, so the output spins faster. (The smaller gear must rotate more times to mesh with the larger gear’s teeth.)

In simple gear pairs, speed is inversely related to the number of teeth. The input gear has 36 teeth and drives a 20-tooth gear, so the gear-teeth ratio is 36:20, which simplifies to 9:5. The speed ratio is the inverse of this, giving 5:9. This means for every 5 revolutions of the input, the output makes 9 revolutions, so the output spins faster. (The smaller gear must rotate more times to mesh with the larger gear’s teeth.)

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