The drag force decreases as the speed of an object moving through fluid _.
Correct answer: B. Decreases
- A. Increases
- B. Decreases
- C. Remains constant
- D. Both B and C
Explanation
Drag force is a resistive force, which can only increase as forward force increases. This is in accordance with Newton's Law that every force has an equal and opposite force acting on it.
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About Fluid Drag
Fluid drag is the resistive force exerted by a liquid or gas on an object moving through it, and its value depends on speed, fluid density, shape and exposed area. Questions examine drag at low and high speeds, terminal velocity when drag balances weight, and the difference between drag and ordinary solid friction.
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