Cars in a circle answers:
01 - cars in a circle.pdf
Physics 12 Formulae Sheet
http://www2.gov.bc.ca/assets/gov/education/kindergarten-to-grade-12/teach/pdfs/curriculum/sciences/2006physics1112.pdf
(page 56)
http://scienceres-edcp-educ.sites.olt.ubc.ca/secondary/physics/
