Centrifugal force - calculate frequency
https://www.youtube.com/watch?v=bpFK2VCRHUs&list=PL4tJAG0oU006yz2M9BB16McLer-JsFg_Y&index=8
Centrifugal force - calculate frequency
https://www.youtube.com/watch?v=bpFK2VCRHUs&list=PL4tJAG0oU006yz2M9BB16McLer-JsFg_Y&index=8