CAN A WEBBED FEET OF DUCKS REDUCE THEIR FRICTION IN WATER ? REGARDING FLUID FRICTION .......

Dear student, , it can be said that the duck movement under water can be divided into two phases. The first phase is the "Stroking back" and followed by the second phase "Forward movement". In the first phase, the duck fully opens the webbed feet in order to maximize the contact area with the water in order to create as much force as possible to move forward. In the second phase, the duck closes the webbed feet in order to minimize the water resistance. Regards.