Intro to HEV : Forces acting on vehicle

Objective: Challenge-1: 1. What should be the maximum speed of the motor used in an electric scooter capable to run at 90 kmph, if the fixed gear ratio is 7 and tire size is 90/100 R10 53J? Recalculate the same value if tire code is 90/90 R18 51P? How to read a tire? Using…