Physics
Grade-9
Easy

Question

What is common between these images to overcome fluid friction?

  1. Nature of the fluid
  2. Shape of the object
  3. Size of the object
  4. Speed of the fluid

hintHint:

When an object moves through a fluid, it expends energy fighting the friction. When fluid flows beside an object, its shape significantly affects whether the fluid friction is increased or decreased.

The correct answer is: Shape of the object


    The common between these images to overcome fluid friction is the Shape of the object.
    • The fluid friction is caused to resist the motion of an object moving on the liquid.
    • To overcome the fluid and air friction the objects are designed with particular shapes.
    • Both birds and aeroplanes have unique/specific shapes that enable airborne flight.
    • Fish have a unique streamlined body that enables them to move constantly in water and even stops them from losing energy from fluid friction, such as a tail and fins.
    • To ensure optimal use and movement, vehicles are designed to experience the least amount of fluid friction when moving.

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