Final answer:
To find the number of revolutions per minute the bicycle wheels are turning, you can use the formula: RPM = Speed / Circumference. Given the diameter of each wheel and the speed of the bicycle, you can calculate the circumference of each wheel and then determine the number of revolutions per minute.
Step-by-step explanation:
To find the number of revolutions per minute the bicycle wheels are turning, we can use the formula:
Revolutions per minute (RPM) = Speed (m/s) / Circumference (m)
The circumference of a wheel can be found using the formula:
Circumference = π * Diameter
In this case, the diameter of each wheel is given as 28 cm, which is equivalent to 0.28 meters. Therefore, the circumference of each wheel is:
Circumference = π * 0.28 = 0.88 meters
Now, we can plug this value along with the given speed of 40 m/s into the first formula:
RPM = 40 / 0.88 ≈ 45.45
Therefore, the wheels are turning at approximately 45.45 revolutions per minute.