A scooter has the following specifications- 110 kg Kerb weight Rider weight 70 kg Front Tire 90/90-12 Rear Tire 90/90-12 Coefficient of Rolling Resistance 0.01 Total Reduction (From motor to wheel) Maximum motor output power 5 kW Assuming g=9.8 m/s^2 A. Find the motor speed (in rpm) for a maximum scooter speed of 80 kmph B. Find the minimum motor output torque to achieve 0 to 40 kmph in 3 sec. You can ignore aerodynamic resistance. Assume that the motor torque and power graph is as follows. T P,T Constant Power region (Fix-weakening region) Constnt to que region @hase Speed max Note : Assumptions are allowed as far as they don't conflict with the data given

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Center of Gravity and Centroid

The term center of gravity indicates the position or location of a point about which the whole weight of a body or system is supposed to be concentrated, which means the whole weight of the body or system works through this point. It is closely related to mass distribution. For all positions of the body, the center of gravity would be a single point.