FUVEST 2019 | Em uma fábrica, um técnico deve medir a velocidade angular de uma polia girando.

In a factory, a technician must measure the angular velocity of a rotating pulley. He turns off the ambient lights and illuminates the part only with the light of a strobe lamp, whose frequency can be continuously varied and precisely known. The pulley has a white spot on its side. He observes that when the flash frequency is , the spot on the pulley appears to be stationary. Then he slowly increases the flashing frequency of the lamp, and only when it reaches does the spot on the pulley appear to be stationary again. Based on these observations, he determines that the angular velocity of the pulley, in , is: a) b) c) d) e) Want to be accepted into Medicine, Fuvest, ENEM? https://fisicacomrenatobrito.com.br Want to be accepted into Military Entrance Exams: AFA, EFOMM, Espcex, EEAR, EN, IME, ITA? https://fisicacomrenatobrito.com.br Want to ask more questions directly to Professor Renato Brito? Contact him directly via TELEGRAM by clicking the link below: https://t.me/+GTBil-aVbYo5OTY5 Renato Brito's Instagram: https://www.instagram.com/profrenatob... Renato Brito's TIK TOK:   / profrenatobrito   TO LEARN MORE ABOUT THE PHYSICS COURSE FOR MILITARY SCHOOLS, visit the website: https://fisicacomrenatobrito.com.br/