Above what speed does a 3.1-mm-diameter ball bearing in 20∘C water experience quadratic drag?
Drag force acting on an object is always directed in the opposite direction of the velocity of the object.
If is the density of water, is the velocity of the ball, is the ball's front area which is interacts with the water then the formula to calculate the quadratic drag is given by
where is the drag coefficient.
Again the relationship between the drag coefficient and Reynolds number is given by
where is the Reynold's number.
Again the formula to calculate the Reynold's number is given by
where is the diameter of the ball and is the dynamic viscosity.
Note: At the value of for water is , density of water at is
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