Fluid Friction

  1. Q1: What do we call the frictional force exerted by fluids?
    Answer: Drag
    Explanation: The force opposing motion through a fluid (like air or water) is called drag.
  2. Q2: What is a common term used for both liquids and gases together?
    Answer: Fluids
    Explanation: Liquids and gases are both referred to as fluids because they can flow.
  3. Q3: What force acts on a moving object in air or water?
    Answer: Friction
    Explanation: Fluids exert frictional force on objects moving through them, known as fluid friction.
  4. Q4: What increases with the speed of an object moving through a fluid?
    Answer: Drag
    Explanation: Drag increases as the speed of the object through the fluid increases.
  5. Q5: What shape helps reduce friction in fluids?
    Answer: Streamlined
    Explanation: Streamlined shapes reduce fluid resistance and help objects move smoothly through fluids.
  6. Q6: What is reduced in a body when its shape is streamlined?
    Answer: Resistance
    Explanation: Streamlining minimizes resistance from air or water, reducing friction.
  7. Q7: What kind of vehicles are designed with streamlined bodies to reduce air drag?
    Answer: Aeroplanes
    Explanation: Aeroplanes are shaped in a streamlined manner to cut through air with less resistance.
  8. Q8: What aquatic animals have streamlined bodies to reduce friction?
    Answer: Fishes
    Explanation: Fish have naturally streamlined bodies to move easily through water with minimal resistance.
  9. Q9: What fluid, other than water, exerts friction on moving vehicles?
    Answer: Air
    Explanation: Air, being a fluid, resists motion of objects through it, creating air friction or drag.
  10. Q10: What force is minimized in ships and boats using streamlined shapes?
    Answer: Drag
    Explanation: Streamlined design reduces drag from water, making movement more efficient.

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