Determine the speed for an emery wheel with a diameter of 50 cm, if the wheel speed is 360 km / h.

The speed of movement of the emery wheel can be expressed by the formula:
V = 2Π * R * n, where V is the speed of rotation of the emery wheel (V = 360 km / h = 360 * 1000/3600 = 100 m / s), R is the radius of the emery wheel (R = 0.5D, where D = 50 cm = 0.5 m), n is the speed of the emery wheel.
Let’s express and calculate the speed of the emery wheel:
n = V / (2Π * 0.5D) = 100 / (2 * 3.14 * 0.5 * 0.5) = 63.7 r / s.
Answer: The speed of the emery wheel is 63.7 r / s.