A 20-toothed gear wheel drives a 60-toothed one. If the angular speed of the smaller...

JAMB 1988

A 20-toothed gear wheel drives a 60-toothed one. If the angular speed of the smaller wheel is 120 rev s^-1, the angular speed of the larger wheel is

A. 3 rev s^-1
B. 40 rev s^-1
C. 360 rev s^-1
D. 2400 rev s^-1

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Correct Answer: Option C

Explanation

\(\frac{\text {speed of driver}}{\text {speeder driven}}\) = \(\frac{\text {no. of teeth of driver}}{\text {no. of teeth of driven}}\)

\(\frac{120}{V}\) = \(\frac{20}{60}\)

v = 360 rev s^-1

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A 20-toothed gear wheel drives a 60-toothed one. If the angular speed of the smaller...

Correct Answer: Option C

Explanation

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