You are given a list of cogs in a gear train
Each element represents the number of teeth of that cog
e.g. [100, 75] means
- 1st cog has 100 teeth
- 2nd cog has 75 teeth
If the first cog rotates clockwise at 1 RPM what is the RPM of the final cog?
(use negative numbers for anti-clockwise rotation)
- no two cogs share the same shaft