Cars on Flooded Streets

摘要

A model car was pushed and then allowed tofreelydecelerate through water with depthsranging from 0.0 to 4.0 cm. Water depths that submerged only the wheels, not reaching the body of the car, were tested. It was shown that the rate of increase of drag force decreasesas depth of water increases,and the drag force isproportional to the velocityof the car.The drag force was almost constant for water depthsabove 75% of the wheel’s radius, for a given velocity.