Hi, everyone. I am assigned a school project to design a off-road car from scratch. In order to do that, i need to size the motor effectively. I understand that power depends on the following factors: static friction, kinetic friction, air drag, gear efficiencies and orientations of planes. In addition, i know that in order to start a car moving, i need to overcome the static friciton, and from there, i need to find the starting torque required from the motor to start the car moving. Below is my assumed working: total static frictional forces (for 4 wheels) = coefficient of friction*weight of car total torque = r*F = radius of wheel * frictional force. This would be the torque i need to size my motor. Am i correct? Please advise me. Thanks in advance!