Am designing a three wheeled cycle. The total gross weight of my vehicle including the frame + riders will be around 300Kg, which has to move at 20Kmph(5.55 m/s) speed . The basic driving force will be provided by pedaling. Assuming the least acceleration to start from rest as 0.2m/s^2, how should i calculate the pedal force required? I started with this approach - Step 1: Acceleration = 0.2m/s^2 Step 2: Total force required = Rolling Frictional force + Accelerating Force = 0.005*300*9.81 + 300*0.2 = 74.7 N Step 3: Wheel Torque = Force X Wheel radius = 74.7*0.3 = 22Nm. Step 4: Assuming no Gearing between wheel and pedal, Pedal Torque = Pedal force*Radius of pedal So i get pedal force = 22 / (0.18) = 122 N I my method/approach correct ? Here I have used just the linear velocity and acceleration, since am dealing with pedals and wheels should I deal with the rotational velocity and acceleration?