地鐵的加速度係幾多？(phy力學)

The average speed is about 80 km/h. But in some special sections of the rail, e.g. the Tung Chung Line or the Airport Express, speed could reach 120 km/h

In general, the time taken between two stations is about 2 minutes, assuming 30 seconds for acceleration and 30 seconds for decceleration, the acceleration can be worked out,
acceleration = (80x1000/3600)/30 m/s = 0.74 m/s2