Train speed 72 km / h How many revolutions per minute does a carriage wheel with a radius of 1.2 m?
| April 23, 2021 | education
The circumference of the wheel is:
L = 2ΠR, where R is the radius of the car wheel (R = 1.2 m).
L = 2ΠR = 2 * 3.14 * 1.2 = 7.5236 m.
The resulting distance will correspond to one revolution of the wheel.
Train speed: V = 72 km / h = 72 * 1000/60 m / min = 1200 m / min.
Let’s calculate the number of revolutions per minute:
rpm = V / L = 1200 / 7.5236 ≈ 160.
Answer: The carriage wheel makes 160 revolutions per minute.
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.
