The mass of the E-bike is 40kg, and the maximum speed is 25km / h. how far can the E-bike pass at the maximum speed of 45 minutes? How many meters per second is the speed? During the driving process, the contact area between each tire and the ground is 0.005 square. When a person with a weight of 40kg sits on the car, the ground pressure is?

(1) 25km / h = 25000m ／ 3600s = 125 / 18m / s ≈ 6.94m/s 45 minutes = 0.75h maximum speed driving 45 minutes can pass far: Formula: displacement = speed × time l = 25km / h × 0.75h = 18.75km (2) two tires, contact area is 0.005M & # 178; × 2 = 0.01M & # 178; pressure

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