Bicycle mechanics Refer to Exercise 52. An expert cyclist can attain a speed of 40 mi/hr. If the sprocket assembly has r = 5 in., r2 = 2 in., and the wheel has a diameter of 28 inches, approximately how many revolutions per minute of the front sprocket wheel will produce a speed of 40 mi/hr? (Hint: First change 40 mi/hr to in./sec.)

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