FYKOS Year 31 Series 3 Problem 1 — slowed down · FYKOS 31 #31.3.1
Physics · mechanics · optics
Problem
Let's suppose a camera with a frame rate of 24 frames per second (consider evenly spaced and perfectly sharp shots). We record a flight of a helicopter with the rotor rotation velocity of 2 900 cycles/min. Then the record is played. What is the apparent rotational velocity of the rotor in the record?