Answer:
1. Fast and slow are relative. The output power is 500 watts, the car speed is about 34 kilometers per hour, the output power is 800 W, the car speed is about 40 kilometers per hour, the speed is d 'about 52 W, the speed is about 58; ; Output 3000W, speed is about 65.
2. The greater the power, the more electrical energy will be consumed, so the mileage will be shorter. But to transport a person, you usually need a motor of more than 800 watts to feel the speed.
3. If you use a 60 volt 100 amp hour battery to ride with people, you can go about 170 kilometers.