The maximum dragging force on a sphere of weight 9.8 N is
Correct answer: A. 9.8 N
- A. 9.8 N
- B. 4.9 N
- C. 19.6 N
- D. 20 N
Explanation
The maximum dragging force on a sphere moving through a fluid is equal to its weight, which is 9.8 N in this case. Drag force equals the gravitational force acting on the object when it is moving at terminal velocity. Thus, the maximum dragging force is equal to the weight of the sphere.
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About Fluid Dynamics
Fluid flow is described through speed, pressure and density, including steady flow and the equation of continuity for conserving mass. Bernoulli's equation relates pressure, speed and height, while fluid drag and terminal velocity explain why a falling object eventually moves at constant speed when drag balances its weight.
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